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MONTHLY FOURPENCE.

By Post, Fivepence.

Nog. 1 to 204 may still be bad, price 8d. 21.

Nos. 205 to date, price 4d. eaca.

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COMFORTING

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MICROSCOPIC PREPARATIONS.
FIRST-CLASS SPECIMENS, New and Rare Objects in every Department of Microscopy.

LORD S. G. OSBORNE'S DIATOMESCOPE, Post-free, 12s.
Five Typical Examples of Blood Discs on one Slide, Man, Fish, Bird, Snake, and Frog, Double Stained, 3s. 6d. post-free.
Pistil of Mirabilis Jalapæ. For Para- ERNEST HINTON. Voivos giocator:

Volvox globator. For Paraboloid, boloid, ls. 2d. post-free. 12, VORLEY ROAD, UPPER HOLLOWAY, LONDON, N.

(TWENTY YEARS WITH THE LATE E. WHEELER.) CABINETS FOR MINERALS, FOSSILS, &c. 6 DRAWERS, 20 INCHES HIGH .. 218. 8 DRAWERS, 28 INCHES HIGH .. 288. 10 39 99 .. 458. / 12

39 Naturalists' Glass-Capped Boxes, Round and Rectangular, from One Shilling

per Dozen,
THOMAS D. RUSSELL, 78, NEWGATE STREET, E.C.

SECOND-HAND MICROSCOPES AND OBJECTIVES,
A large assortment by ROSS, BECK, COLLINS, SWIFT, and other first-class Makers, on Sale, very cheap.

MICROSCOPIC OBJECTS in great variety. Spécialité Physiological and Pathological Tissues. 500 SECOND-HAND PHOTOGRAPHIC LENSES AND CAMERAS By ROSS, DALLMEYER, TENCH, VOIGTLÄNDER, and all other esteemed Makers. The Cheapest and Best Stock in London.

New Catalogues gratis on application. Purchases and Exchanges made. Instruments Repaired and Relacquered. SANDS & HUNTER, 20, CRANBOURNE STREET, LONDON.

PUPA OF THISTLE-BUG, NEW PREPARATIONS THE OAK-APPLE FLY, (MONANTHIA CARDUI.)

(ANDRICUS TERMINALIS.) This is a most interesting

OF INSECTS, Hymenopterous Insect, preparation of the pupa, when

showing the arrangement and about to change to the perfect WITHOUT PRESSURE.

structure of the internal insect, the form and markings

Muscles. of which can be distinctly seen, FRED. ENOCK, A most beautiful preparation For Paraboloid.

for Polariscope, or Paraboloid. 15. 7d., Post-free. 21, PROSPERO ROAD, UPPER HOLLOWAY, LONDON, N. 25. Post-free.

HOW AND CO,'S NEW “POCKET MICROSCOPE LAMP." Very convenient and portable, gives ample Illumination, has all necessary adjustments, is provided with a Cylindrical Case, and can be conveniently carried in the breast coat pocket; when charged

with sufficient Oil to burn for above 31 hours, weighs under 12 oz. Price 8s. 6d. Microscopists who are in the habit of exhibiting at the Meetings of their respective Societies and elsewhere,

should provide themselves with this little Lamp. MICRO-PETROLOGY, TYPICAL ROCK SECTIONS, 1/6 AND 21- EACH. JAMES HOW & Co., 73, FARRINGDON STREET, LONDON.

STUDIES IN MICROSCOPICAL SCIENCE.

Edited by ARTHUR C. COLE, F.R.M.S., &c. VOL. III. Numbers 1 to 10 in each Section now ready. All correspondence connected with this Volume to be

addressed to J. G. HAMMOND & Co., 136 Edmund Street, Birmingham, from whom Prospectus can be

obtained. Now ready, VOL. I., containing 53 Chromo-Lithographed Plates, £i iis. 6d. ; or, accompanied by 52 Prepara.

tions, in Cabinet, £4 145. 6d. . And VOL. II., containing THE METHODS OF MICROSCOPICAL RESEARCH; SECTION I., ANIMAL HISTOLOGY ;

SECTION II., BOTANICAL HISTOLOGY: and POPULAR MICROSCOPICAL STUDIES; with 38 CHROMO

LITHOGRAPHED PLATES, &I iis. 6d. ; or, accompanied by 36 Preparations, in Cabinet, £4 45. od. NOTE.—The Sections of either Volume may be had separately.

All correspondence having reference to Vols. I. and 11. to be addressed to the Editor, ST. DOMINGO HOUSE, 171, Ladbroke Grove Road, Notting Hill, W.

From whom all Particulars may be obtained. ** A. C, COLE AND SON’S Pathological, Physiological, Botanical, and general

Preparations and Diatoms, may be obtained of all the principal Opticians.

MICROSCOPY.-MICRO-NATURAL HISTORY (ZOOLOGICAL AND

BOTANICAL) AND THE ALLIED SCIENCES.
Just Published, and will be sent Post Free for Two Stamps, W. P. Collins's New Catalogue of Books (mostly Secondhand)

Scientific Libraries Purchased and Books taken in Exchange.
W. P. COLLINS, Science Bookseller, 157, Great Portland Street, London, W.

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WATKINS AND DONCASTER, Naturalists and Manufacturers of Entomological Apparatus and Cabinets.

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N.B.- For Excellence and Superiority of Cabinets and Apparatus, references are permitted to

distinguished Patrons and Colleges, &c. Plain Ring Nets, Wire or Cane, including stick, 1/8, 2/5, 2/3. Breeding Cage, 2/6, 1/2,5/-, and 716. Folding Nets, 3/9 and 4/6.

Taxidermist's Companion, ie, a pocket leather case, containing Umbrella Nets, 7/6 (self-acting).

most useful instruments for skinning, 10/6. Pocket Boxes, -76; corked both sides, -/9, 1/-, and 1/6.

Coleopterist's Collecting Bottle, with tube, 1/6, 1/8. Zinc Relaxing Boxes, -/9, 1/2, 1/6, and 2/-.

Ditto, Tin Boxes, 1/6. Ditto, large size, with strap, 6/..

Ditto, Japanned Pocket Case, fitted with 26 tubes, 5/ . Nested Chip Boxes, 4 dozen, -/8.

(black). Botanical Cases, japanned, double tin, 1/6, 4/-, 5/,6/-,9/-. Entomological Pins, assorted or mixed, 1/- per oz. (white or Botanical Paper, 1/1, 1/4, 1/9, and 2/a per quire. (Too heavy Glass Killing Bottles or Tubes ready for use, il., 1/5.

for post.) Sugaring Lanterns, 2/6 to 10/-.

Insect Cases, imitation mahogany, 3/6 to 11/-. Sugaring Tin, with brush, 1/6, 2/-.

Cement for replacing Antennæ, -76 per bottle. Mite Destroyer (not inflammable nor dangerous to use), 1/- per Forceps for removing Insects, 2/6 per pair. (Supplied to Store Boxes, 2/6, 4/-,5/-, and 6/-.

Collectors all over the world.) Ditto, Book Pattern, 8/6, 9/6, and 10/6.

Cabinet Cork, 7 X 34. best quality, 1/3 per dozen sheets. Setting Boards, flat or oval, 1-in., -/6; it-in. -/8; 1t-in., -79 | Pupa Diggers, 1/6, 2/-. Insect Lens, 1/6 to 8/-.

z-in., -/10; 2t-in. 1/-; z-in., 1/2; 3t-in., 1/4; 4-in., 1/6; Glass Top Boxes, per dozen, 1/8, 2/2, 2/6.

41.in., 1/8: 5-in., 1/10. Complete set of 14 boards, 10/6. Egg Drills, -/3. Setting Houses, 9/6 and 11/6; corked back, 14/6.

Metal Blow-pipes, -/7. Zinc Larva Boxes, 9/6, 1/

| Setting Needles, 6d. per box. All Articles enumerated are kept in stock, and can be sent immediately on receipt of order. For Sale, a large Assortment of Ova and Pupæ of both British and Foreign Butterflies and Moths.

CABINETS, Special Show Room.
The following are the prices of a few of smaller sizes; for measurements and larger sizes soe Catalogue (48 pp.)

Minerals and Dried
Insect. Eggs. M

Insect. Eggs. Minerals and Dried • Plants, Fossils, &c.

Plants, Fossils, &c. 4 Drawers .. .. 14/- .... 12/6 .. .. 10/6

8 Drawers .... 32/• .. .. 30/• .. .. 23/6 .. .. 18/• .. .. 16/6 .. .. 15/

10 .... 48/- .... 42/- .... 40/A LARGE STOCK OF INSECTS AND BIRDS' EGGS.

Birds, Mammals, &c., Preserved and Mounted by First-class workmen.

36, STRAND, W.C. (FIVE DOORS FROM CHARING CROSS).

FIVE GUINEAS IN PRIZES, 2d.] NATURALIST'S WORLD. [2d.

THE

A Monthly Illustrated Magazine of Natural History. £1 ls, for best Essay on life of ROBERT DICK. £1 ls. for best collection of 100 Short Sayings from well-known Natural History Writers. £1 ls. for best account of a NATURAL HISTORY RAMBLE. £1 1s. for best photograph of BRITISH SCENERY. £1 ls. for best collection of 12 SPRING FLOWERS. Specimen copy of The Naturalist's World, with full particulars of competitions, post-free 2}d. from

PERCY LUND & CO., Ilkley, Yorks. LONDON: W. SWAN SONNENSCHEIN & CO., and of all Booksellers. MICRO-SLIDES FOR SCIENCE CLASSES, Sciadocalyx luciana, Trichomes highly polar.

Dendrobium nobile, Air Root, Plerome Sheath, Chestnut or Ash, Transierse Fibre Of Petiole.
Salisburia, Raphides in Conifer.
Anthurium, Spudix, Trans. Sect.

Fix leaf Bud, Meristem.
Carnation, Vert. Sect. C Stomata.
Walnut, Lignified Parenchyma.

Hoya, Strongly thickened Parenchyma Cells.
Aponogeton fluitans, Nuclei and Nucleoli.
Ricinus Seed, Aieurone Grains.

Bistort, Raphides in Tuber.

(Spores, Dodder, Suckers penetrating Clover, Dahlia Tubers, Inulin Crystalloids.

Aneura pinguis (Jungermanniacev) Elaters and Cordiceps Sinensis, T.V.of Fungus on Caterpillar. Camellia Leaf, Trans. Sect. large Cystoliths.

Puccinia Graminis, Tilentospores.
Water Lily, Trichublasts (tolar).
Hibbertia, Reticulatat Epidermis.

Clematis Vitalba, Middle lameiki.
The Series as above, complete FIFTEEN SHILLINGS.
Mr. PIFFARD'S Patent Counter-sunk Slips. Sizes now ready. 3-16 and 5-8. SIX SHILLINGS per Dozen.

REMITTANCE WITH ORDER.
B. PIFFARD, Hill House, Hemel Hempsted, Herts.
SCHWEITZER’S COCOATINA.

Anti-Dyspeptic Cocoa or Chocolate Powder. GUARANTEED PURE SOLUBLE COCOA OF THE FINEST QUALITY. The Faculty pronounce it 'the most nutritious, perfectly digestible Beverage for BREAKFAST, LUNCHEON, or SUPPER, and invaluable for

Invalids, and Young Children.' Being without sugar, spice, or other admirture, it suits all palates, keeps for years in all climates, and is four times the strength of

Cocoas thickened yet weakened with arrowroot, starch, &C., and in reality cheaper than such mixtures.

Made instantaneously with boiling water, a Teaspoonful to a Breakfast Cup, costing less than one halfpenny.
COCOATINA possesses remarkable sustaining properties, and is specially adapted for

early Breakfasts.
Air-Tight Tins, at 1s. 60., 38., 6s. 6d., &c., by Chemists and Grocers.

THE GRESHAM LIFE ASSURANCE SOCIETY.

ESTABLISHED 1848.

Head Office-ST. MILDRED'S HOUSE, POULTRY, LONDON, E.C.

FUNDS; 1884.
Realised Assets ... ... ... ... ... ... . " *** ***
Life Assurance and Annuity Funds ... ... ... ... ...

Annual Income ... ... ... ... ... ... ... ... ... ... £885,369
Moderate Rates of Premium. Liberal Scale of Annuities. Loans granted upon Security of Freehold, Copyhold, and Leasehoid
Property, Life Interests, and Reversions; also to Corporate and other Public Bodies, upon Security of Rates, &c.

JOSEPH ALLEN, Secretary. Prospectus, Reports, and Proposal Forms can be obtained on application to the Society's Agents and Branch Offices, or to

JOSEPH ALLEN, Secretary.

NORTH BRITISH AND MERCANTILE INSURANCE COMPANY.

INCORPORATED BY ROYAL CHARTER AND SPECIAL ACTS OF PARLIAMENT. Authorised Capital, £3,000,000. Subscribed Capital, £2,500,000. Paid-up Capital, £125,000. Chairman-John White Cater, Esq.

Deputy-Chairman-BARON SCHRODER. Manager of Fire Department_G. H. BURNETT.

Manager of Life Department and Actuary-HENRY COCKBURN. Foreign Sub-Manager-PHILIP WINSOR.

Secretary-F. W. LANCE.

FIRE DEPARTMENT. The Net FIRE FUNDS, irrespective of the Paid-up Capital, now amount to £1,597,295 9s. Bd.

LIFE DEPARTMENT. The LIFE FUND now amounts to £3,458,595 18s. 9d. The ANNUITY FUND now amounts to £536,066 8s. Ed. THE PRINCIPLES on which this Company is conducted combine the system of Mutual Assurance with the safety

of a large Protecting Capital and Accumulaced Funds, and thus afford all the facilities and advantages which can prudently be offered by any Life Assurance Office.

NINETY PER CENT. of the WHOLE PROFITS is divided among the Assurers on the Participating Scale. The PROFITS are divided every Five Years. POLICIES are INDISPUTABLE after Five Years. ANNUITIES of all

Prospectuses and every Information can be obtained at the Chief Ofices, LONDON : 61, THREADNEEDLE ST., E.C. WEST END OFFICE, 8, WATERLOO PLACE, S.W. EDINBURGH, 64, PRINCES ST.

BRITISH EMPIRE MUTUAL LIFE ASSURANCE COMPANY,

NEW BRIDGE STREET, LONDON, E.C.

Incorporated in the year 1847 under Act 7 and 8 Vict., cap. 110, and further empowered by Special Act 15 Vict., cap. 53. Accumulated Fund . . . . . . . .£1,028,215 | Surplus_Funds already appropriated £997,000 Annual Income, nearly . . . . . . £200,000 | Claims Paid ...

Policies in Force . . . . . . . . . £4,793,942

....:.:.:.:. £4,793.94.' .. · · · £1,280, 133 Policies ADSOLUTELY INDISPUTABLE after five years, provided the age of the Assured has been admitted. POLICIES KEPT IN FORCE when requested by appropriating the Surrender Value to the payment of premiums. Assurers under the TEMPERANCE SCHEME are placed in a separate Section. Iolicies may be effected under the DEFERRED BONUS plan.

EDWIN BOWLEY, Secretary. CHRISTMAS PRESENTS!! Just Published, 16-PAGE CATALOGUE of COLLINS MICRO-SPECIALITIES.

Post-free on Application. CHARLES COLLINS, Junr., Micro.Naturalist, Bristol House, Harlesden, London, N.W.

LECTURES on PHYSICAL GEOGRAPHY, GEOLOGY, BOTANY and ZOOLOGY.-The Editor of Science-Gossip is prepared to deliver EXTEMPORANEOUS LECTURES (well illustrated with Diagrams) to NATURAL HISTORY, LITERARY, AND SCIENTIFIC SOCIETIES, &c. For Terms, &c., apply to Editor of Science-Gossip, care of Messrs. CHATTO & WINDUS, 214, Piccadilly, London, W.

NEW, RARE, & INTERESTING OBJECTS FOR THE MICROSCOPE.

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Racliate plates from Myriotrochus Rinkii, grouped, very rare ..

W. WATSON & SONS would call special attention to their Exhibi. Wheel plates from skin of Chirodota .. ..

tion Slides for Soirecs, &c. They are composed of Diatoms,

Whects of Chirodoti, Auchors and Plates from Synapty, &c. Section through the Jaw of Cat-all the teeth in situ-very fine

arranged in most artistic groups. For symmetry and beauty of Section through the Jaw of Rat.. .. .. .. .. .. ..

arrangement they exceed anything previously offered to MicroSection of Jaw of an Infant, permanent and milk teeth in situ .. ..

scopists

Prices, 8.; 7s. od.; 10s. od: 16s. : 215 1 5 Section of Retina, showing Jacob's rod and ultimate termini of nerve

Type slide of Diatomacer, 32 different species with book of names. fibres . ..

This slide is a marvel of manipulative skill, and is of great use Fungus of favus-Achorion Schönleinii ...

to students ..

.. price 4 OO

Type slide of Diatomaceæ, 80 ditierent species, with names photo Liver spots (chloasma) Mycrosporou furfur.. .

graphed bencath each specie .. Hoof of Horse, double stained, very pretty and effective, for po. . Type slidle of Foramenifera, 50 different species, with name photoLariscope

graphed beneath each specie .. Anatomy of a leaf, o pieces on one slide

.. 24. 63. Crystals of Brueme, new and very beautiful, for polariscope .. o is Batrachospermum moniliforme in fructification .

Kimate of Quininc, for polariscope .. Leaf and sections of moss, on one side ..

.. 28.

Crystals of silver, very brilliant. .. .. .. .. .. .. OH 6 CLASSIFIED LIST OF OBJECTS, including the late Mr. E. Wheeler's Stock of over 40,000

First-class Specimens.
ILLUSTRATED CATALOGUE OF MICROSCOPES.

Either of the above sen: Post tree on application to

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W. WATSON & SONS, Opticians to Her Majesty's Government,

313, HIGH HOLBORN LONDON W.C. Established 1837.

14,797

GRAPHIC MICROSCOPY. CARROT ZUM

NOV 16 i
By E. T. DRAPER.

LIBRARY

No. XXIV.-EGGS OF PARASITE OF VULTURE.

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Y OMMONLY sur | in shape and adornment, well exemplified in a

rounded with un | beautiful specimen of a wood mite of the genus
inviting associa Oribata, procured from Mr. C. Collins, jun., of
tions of decay and Harlesden. It presents an extraordinary appearance ;
pollution, the Ap the development is, egg, larva, nymph, and the
terous, or wingless adult male and female. The nymph changes, or
insects, have to the partly moults its skin, four or five times, carrying
uninitiated a repu the cast skins on its back overlapping each other,
tation of repulsive and being necessarily of various sizes they give the
ness and inherent appearance of its being surrounded with a series of
ugliness ; but with flounces. The creature in this condition seems
out comparing them tricked out with a general assortment of frippery and
for beauty with surbelows. The reader is referred to Mr. Michael's
creatures of a high papers, and beautiful plates on this interesting species
er class, they are in late numbers of the “ Journal of the Microscopical
found under micro Society.”
scopic examination Those who have not access to the writings of
to possess an inter Nicolet, Claparède, C. L. Koch, and others, on the
est essentially their Acarina, can procure a cheap handbook, “ Economic

own. Possibly no Entomology ; Aptera,” by Mr. Andrew Murray, pubother order shows, from the egg to perfection, a greater lished by Chapman and Hall, by order of the diversity of form, or more quaint embellishment Committee of Council on Education. It is lavishly

The division Anoplura, commonly known as lice, illustrated with typical forms, well indexed, and are parasitic on mammals and birds. The plate forms a valuable key of reference to more exhaustive represents the eggs of the species infesting the research. feathers of the vulture. The number of varieties is Crouch End. very extensive, and the egg necessarily greatly diversified in configuration. Many are beautifully sculptured, and provided with contrivances in the

TEETH OF FLIES. shape of covers and lids. Almost every bird has a

By W. H. HARRIS. distinct variety, some two or three, and different forms of egg may be found in distinct and separate

No. VIII. localities, in the breast and neck, and on the under

FUCELLA FUCORUM,Fallen. side of the primary wing feathers. Birds in captivity suffer severely, but scarcely any of the feathered THIS fly was taken on debris cast up by the tide tribe escape. Specimens of the rarest beauty may 1 on our coast during the latter part of October, be obtained from the pheasant.

but may, very probably, be taken in other situations Of the Acarina, or mites, a wide and interesting if diligently searched for. There is nothing very field is open to the young microscopist. Found peculiar in its general appearance to attract attention, wherever there is decay and mouldiness, even in the and it is therefore rather difficult to describe satiscavities of the bones of skeletons, they may be re- factorily, so that it may be recognised by the collector. garded as ubiquitous. Many are extremely curious | It is a rather small fly, being not more than about a

No. 252.- DECEMBER 1885.

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