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in Glass, p. 5G9. The Leucocytes, p. 5G9. Spontaneous Generation, p. 570. Successive Polarization of Light, p. G38. A Double Erecting binocular, p. G39. Angular Aperture of the Eye, p. 639. Classification of Microscopic Objects, p. 703. A Life Slide. Illustrated, p. 705. To Blacken Brass, p. 706. An Optical Experiment, p. 706. Camphor in Paraffin Lamps, p. 706. Mounting Small Objects in Balsam, p. 707. Bone Dust in Soap, p. 707. The Eresh Water Polype, p. 707. Reproduction of Sponges, p. 707. Multiplication by Budding of Wheel Animalcules, p. 708. Spicules of Sponges, p. 709. Fungous Growth in Shells, p. 776. Advancing Definitions of Objectives, p. 777. Resolution of Nobert'sBand, p. 777. Photo-mechanical Printing, p. 778. The Submersion Mieroscope, p. 779. The Micro-pantograph. With cut. p. 779. Mounting Tissues in Balsam, 781. Mounting Tissues in Dammar Varnish, p. 781. Logwood Staining Fluid, p. 781. Fungi in Drinking Water, p. 781. Structure of Podura Scales, p. 782. Dry Rot, p. 782.

Notes.— pp. 63, 124, 189, 246, 318, 878, 445, 505, 570, 639, 709, 782.
Answers To Correspondents.— pp. 256, 320, 384, 447, 512, 57G, G40.
Exchanges.— p. 192.
Books Received —pp. 128, 256, 320, 384, 443, 512, 576, 640, 720, 784.

ERRATA.

Vol. V. — Page 504, line 22, for ventral read dorsal; line 24. dele and Donacia. Page 505. line S. for Jionticia read Telepltorus; line 6 from bottom, for They are read Attelubus is. Page 5G'», line 1 from bottom. alter while. Insert Telephorus. Page 745. line 29. for Itaphidophora macutata read Ceuthophilus maculatns; line 31, for Itaphidophnra gvliter* ranea read Iladencecus carerimrum. Page 710, under cut, for Jtnphiilnphora sntiterranea read Htulentecn* earernarum. Page 759, line IS, for llaphidophora read Ceitthophiluf; line 2:1, for Ii read // ,■ and for styyin read Ceuthophihis stygiua; line 35, for It. stygia read Ceuthophilu* stygius.

Vol. VI.— Pago 45. line 9 from bottom, for TEXNIFOLIUM read Temiioliim. Page 72, line 10, for Denver 2105 feet above the sea read 5)05 feet. Page 130, line 3, for equivalency read equivalence. Page 138, line 4 of note, for applications read appliances. Page 140. line 24, for advertency read inadvertency. Page 141, line 3 from bottom, tor from read for. Page 170. head line, for Geology read Zoology. Page 178, head line, for Zoology read Geology; line IS, for Chantauqua read Chautauqua. Page 187, line 18, insert S. before Jleale. Page 192, line 4 from bottom, for 321 read 317. Page 237. line !) from bottom, for Danus read Dannus. Pages 2S0-2S9, Air Crella read Uvclla. Page 28'i, line 30, for glauconia read glaucoma. Page 350, line 3, for Leucosticta yriseinucha read L. lephrocolis. Page 327. place § before last note. Pages 327 and 320, in the last square of the upper row insert a comma after binoailar. Page 374. line 25, for Dongall read Oougall. Page 515. line 15. for W. Doubledoy read Mr. Doubleday; last line but one, for ere/i unite their faces read ever unite their forces. Page 516, line G, for enclosed read eclosed.- line 9, for there read then ; line 10, for trace read traces.

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No. Pngc

1. Cuban Blind Fish, Stygicola

dentatus 10

2. Mudfish, Melanura liini. . . 14

3-8. Representing six genera of

Darters. Ethenstoinoids, 110-112

9-30. Twenty-two tlgures of An-

cient* Stone Implements

from New Jersey, . . 144-160

31-87. Fifty-seven figures of Ancient

stone Implements from

New Jersey 200-227

88-93. Five flgures'of Monads, 280-289

93. The Strawberry Crown-borer,

Larva ami Beetle 203

94-95. The Grape Amphipvra,

Larva and Moth, .... 293

9S-97. The Grape Colaspis, Larva

and Beetle 2!>3

98-911. The White-lined Morning

Sphinx and Larva. ... 294

100. A Deep Sea Coral, Haplo-

phyllia, 290

101. Jumping Mouse, Jaculus

Iludsonius 3:10

102-108. Fruit of the Fedias of the

Northern United States, 3.S6-3S7

1011-110. C«cidotea mlcrocephala,

from the Wyandotte Cave, 411

111-113. CauloxenuH stvgius. . . . 412

111-115. Ercbomaster flavescens, . . 415

lli», Orconectes incrmls. .... 419

1. 2. 3. A New Erecting Prism, . . 440

117-118. Echinorhyucus gigas, . . . 450

139-142.

113.

lit.

145.

14K.

147.

118.

I .VI.

1.11.

152.

153.

Trivia Europa-a 7:13

Skull of a Mound-builder

from Illinois 739

Typical skull of the Mound-

building race 740

Cut showing the comparative

size and shape of various

skulls, 745

Chelifer cancroides, .... 767

Brazilian Octopus, .... 772

Micro-pantograph, .... 780

[graphic]

LIST OF CONTRIBUTORS TO VOL. VI.

TO GENERAL ARTICLES.

Dr. Citarlks C. Abbott, Trenton, N.J.

Prof. L. Agassiz, Cambridge, Mass.

J. A. Allen, Cambridge, Mass.

Prof. T. I). Biscoe, Cincinnati, Ohio.

Rev. H. J. Bruce, Springfield, Mass.

Prof. E. D. Cope. Haddonfleld, N. J.

Dr. A. H. Ccrtiss, Liberty, Va.

Prof. James D. Dana, New Haven, Connecticut.

J. W. Foster, LL.D., Chicago, 111.

Prof. Asa Gray, Cambridge, Mass.

Rev. E. L. Greene, Greeley, Colorado.

Dr. H. Hagen, Cambridge, Mass.

Prof. Henry Hartshorne, Philadelphia, Pa.

Prof. C- Fred. Hartt, Ithaca, N. Y.

John G. Henderson, Springfield, Illinois.

Rev. Samuel Lockwood, Keyport, New Jersey.

B. P. Mann, Cambridge, Mass.

Prof. James Orton, Poughkeepsie, New York.

Prof. H. W. Parker, Amherst, Mass.

Dr. C. C. Parry, Davenport, Ohio.

Prof. Tnos. C. Porter, Eastou, Pennsylvania.

F. W. Putnam, Salem, Mass.

Robkrt Riixiwat, Washington.

Prof. C. V. Riley, St. Louis, Mo.

S. H. Scudded, Mentone, France.

Prof. N. S. Shai.er, Cambridge, Massachusetts.

R. E. C. Stearns, San Francisco, California.

Prof. Sanborn Tenney, Williamstown, Mass.

Prof. Albert H. Tuttle, Cainbridge, Mass.

Lord Walsingham, Thetford, Eng.

Dr. R. H. Ward, Troy, N. Y.

Dr. William Wood, East Windsor Hill, Ct.

Dr. J. J. Woodward, U. S. Army, Washington, D. C.

TO REVIEWS AND BOOK NOTICES.

J. A. Allen, Cambridge, Mass.
Rev. E. C. Bolles, Salem. Mass.
Dr. T. M. Brewer. Boston. Mass.
Dr. Elliott Coues. V. S. Army.
Dr. H. Hagen, Cambridge, Mass.
J. H. Lintner, Albany, N. Y.
Dr. A. S. Packard, Jr., Salem, Mass.

Prof. J. B. Perry, Cambridge, Mass.

F. W. Putnam. Salem, Mass.

Prof. C. V. Riley, St. Louis, Mo.

S. H. Scudder. Mentone, France.

Prof. Frank II. Snow, Lawrence, Kansas.

Dr. R. H. Ward, Troy, N. Y.

TO MISCELLANY.

Dr. C. C. Abbott. Trenton. N*. J.

Academy of Natural Sciences of Philadelphia, Penn.

Alexander Agassiz. Cambridge, Mass.

Prof. L. Agassiz. Cambridge, Mays.

J. A. Allen, Cambridge. Mass.

American Philosophical Society, Philadelphia. Penn.

Prof. J. C. Arthur, Iowa Agricultural College.

C. G. Atkins, Augusta, Maine.

W. W. Bailey, Providence, R. I.

W. J. Bcal. Lansing, Mich.

A. W. Reunett. London. Kngland.

C. E. Iiessey. Iowa State Agricultural College.

W. G. Binney, Burlington. X. J.

Prof. T. I>. Biscoo, Cincinnati. Ohio.

J. H. Blake. Cambridge. Mass.

Richard Bliss, Jr.. Cambridge. Mass.

Win. Brewster,Cambridge. Mass.

VV. B. Brooks. Suspension Bridge, X. Y.

California Academy of Sciences, San Francisco.

V. T. Chambers. Covington. Kv.

Prof. T. A. Cheney, Leon. N. V.

Prof. J. W. Chiclcering, Jr., Washington. I). C.

N. Coleman, Otsego, Mich.

Prof. A. J. Cook, Lansing, Mich.

Prof. E. !">. Cope. Iladdonlleld, N. J.

Dr. Klliott Coucs, IT. S. Army.

Dr. Josiah Curtis. Kuoxvillel Tenn.

W. II. Dall, Ala>ka.

Ruthven Deane, Cambridge. Mass.

T. W. Deering, Leavenworth, Kansas.

Rev. S. A. L. Drew, South Kovulton. V't.

Dr. B. D. Eastman, Washington, D. C.

Wm. Edwards.

James II. Enierton, Salem. Mass.

Dr. W. G. Fallow, Cambridge. Mass.

Lieut. C. Fitzgerald. British Army.

Dr. Foreman, Baltimore. Md.

S. W. Carman, Minnesota.

Prof. Tlieo. Gill. Washington, D. C.

Henry Gillman. Detroit, Mich.

Prof. G. Brown Goode, Middletown. Ct.

Kev. E. L. Greene, Greeley, Colorado.

COPIED FROM.

Academy. London.

AmeJicau Journal of Science and Arts, New Haven.

Annuls and Magazine of Xatural History, London.

Bulletin o/ the Essex Institute, Salem.

College Courant, New Haven.

English Mechanic and World of Science, London.

Entomologist's Monthly Magazine, London.

Journal of the Anthropological Institute, New York.

Journal of Botany, London.

Journal of Franklin Institute. Philadelphia.

Prof. Asa Gray. Cambridge, Mass.

Dr. II. Hagen. Cambridge, Mass.

Prof. S. S. Haldcm.m, Philadelphia, Penn.

Dr. II. Hartshorne, Philadelphia. Penn.

II. 11. liollenbriisli. Rea<ling, Penn.

Prof. Alpheus Hvatt, Salem. Mass.

Prof. D. S. Jordan. Ithaca, N. Y.

IKS. Kedney, Camden, S. C.

Dr. A. Kellogg. San Francisco, Cal.

I. A. Lapham, Milwaukee. Wis.
Prof. J. Leidy, Philadelphia, Penn.
G. Lincecum, Long Point, Texas.
Rev. Samuel Loekwood, Keyport, N. J.
Prof. f). C. Marsh. Sew Haven, Ct.

C. J. Mavnard, Ipswich, Mass.
Thomas "Mcehan. Germantown, Peun.
Lewis Mitchell, Norwich, Ct.

C. II. Xauman, Volusia Co., Florida.
Edward Norton, Farmington. Ct.

Prof. James Orton. Poughkeepsie, N. Y.
Dr. A. S. Packard, Jr.. Salem, Mass,
Prof. H. W. Parker, Amherst, Mass.
Prof. G. II. Perkins, Burlington, Vt.
F. W. Putnam. Salem. Mass.
Robert Kidgwnr. Washington. D. C.
Prof. C. V. Rilev. St. Louis. Mo.
S. H. Scndder. Mentoue. France.
Prof. N. S. Shaler, Cambridge, Mass.
Dr. II. L. Smith, New York.
J. Edward Smith, Ashtabula, Ohio.
Smithsonian Institution. Washington, D. C.
Charles J. Sprague, Boston. Mass.
R. E. C. Stearns, San Francisco, Cal.
Dr. Wm. Stimpson. Chicago. 111.
Charles Stoilder, Boston. Mass.
Prof. J. Sullivant. Columbus, Ohio.

D. J. Tnpley, Danvers, Mass.

Prof. S. Tenner. Williamstown, Mass.
Idilicrt B. Tolles, Boston. Mass.
T. Martin Trippe. Orange. N. J.
Dr. It. II. Ward. Trov. N. Y.
Prof. B. G. Wilder. Ithaca. N. Y.

II. Wilier. New Bedford. Mass.

Dr. Win.'Wood, East Windsor Hill. Ct.
Dr. J. J. Woodward, II. S. A. Med. Mus.
Prof. J. Wvnian, Cambridge. Mass.
Dr. U. C. Yarrow, Cambridge, Mass.

Journal of the Qucckett Club, London.

Lnnxl and Water, London.

Manchester Guardian. Manchester, Eng.

Medical Record, New Y'ork.

Monthly Microscopical Journal, London.

Nature, London.

Pall MM Budget. London.

Qtiartcrly Journal of Microscopical Science,

London.
Report of State Entomologist of Missouri

for 18fi, St. Louis.
Revue Scient^tiquc.
Science Gossip. London.
Siebold and Kolliker's Xeitschrift.
Spener'sche Zeitung, Berlin.

[graphic]

THE

AMERICAN NATURALIST.

Vol. VI.-JANUARY, 1872.-No. 1.
CONCERNING DEEP-SEA DREDGINGS.

BY PROF. L. AGAS3IZ. *

My Dear Friend : — On the point of starting for the Deep-Sea Dredging expedition, for which you have so fully provided, and which I trust may prove to be one of the best rewards for your devotion to the interests of the Coast Survey, I am desirous to leave in yonr hands a document which may be very compromising for me, but which I nevertheless am determined to write in the hope of showing within what limits natural history has advanced toward that point of maturity when science may anticipate the discovery of facts.

If there is, as I believe to be the case, a plan according to which the affinities among animals and the order of their succession in time were determined from the beginning, and if that plan is reflected in the mode of growth, and in the geographical distribution of all living beings; or, in other words, if this world of ours is the work of intelligence, and not merely the product of force ami matter, the human mind, as a part of the whole, should so chime with it, that, from what is known, it may reach the unknown ; and if this be so the amount of information thus far gathered should, within the limits of errors which the imperfection of our knowledge renders unavoidable, be sufficient to foretell what

'Communicated by Prof. I'eircc from advance sheets of Bulletin of the Museum of Comparative Zoology. No. 3. A Letter concerning Deep-Sea Dredginga, addressed to Professor Benjamin Peirce, Superintendent United States Coast Survey, by Louis Agassis. Cambridge. Mass., December 2, 1871.

Entered according to Act of Congress. In the year 1872, by the Peabody Academy or Science, in the Office of the Librarian of Congress, at Washington.

AMKH. NATURALIST, VOL. VI. I (1)

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