Outlines of natural history for beginners |
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Página 18
... upper surface of the body in the Star - fish is covered with a leathery skin , from which project nume- rous blunt conical spines or prickles composed of lime . Along the middle of the back of each arm , these spines form a well ...
... upper surface of the body in the Star - fish is covered with a leathery skin , from which project nume- rous blunt conical spines or prickles composed of lime . Along the middle of the back of each arm , these spines form a well ...
Página 22
... upper por- tion of the gullet ( c ) is much dilated , and contains a com- plicated series of horny jaws . There is a well - developed stomach ( d ) , and the intes- tine opens into a chamber , with which the " water - ves- sels " also ...
... upper por- tion of the gullet ( c ) is much dilated , and contains a com- plicated series of horny jaws . There is a well - developed stomach ( d ) , and the intes- tine opens into a chamber , with which the " water - ves- sels " also ...
Página 23
... upper portion of the gullet , with the horny distinguish the class of the Scole- jaws ; d Stomach ; e Cham- cida as a whole . ber into which the intestine opens ; gg Water - vessels , opening into contractile chamber ( f ) ; h Nervous ...
... upper portion of the gullet , with the horny distinguish the class of the Scole- jaws ; d Stomach ; e Cham- cida as a whole . ber into which the intestine opens ; gg Water - vessels , opening into contractile chamber ( f ) ; h Nervous ...
Página 24
... upper lip , and is per- Fig . 10. a The Medicinal forated by the opening of the Leech ( Sanguisuga offici- nalis ) , natural size ; b An- mouth . When moving , the Leech terior extremity of the same magnified , showing fixes its hinder ...
... upper lip , and is per- Fig . 10. a The Medicinal forated by the opening of the Leech ( Sanguisuga offici- nalis ) , natural size ; b An- mouth . When moving , the Leech terior extremity of the same magnified , showing fixes its hinder ...
Página 28
... last five being " swimmerets , " and the last of all being greatly ex- panded ; t The last segment of the body , without appendages . 66 segment consists of an upper and a lower arch. 28 OUTLINES OF NATURAL HISTORY . ...
... last five being " swimmerets , " and the last of all being greatly ex- panded ; t The last segment of the body , without appendages . 66 segment consists of an upper and a lower arch. 28 OUTLINES OF NATURAL HISTORY . ...
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abdomen adductor muscle Advanced Text-Books animal antennæ appendages arms attached backbone beak bivalve blood body body-cavity bone breathing-organs breathing-tubes carries cavity chambers characters distinguish colour common common Frog common House Spider composed consists contained Crown 8vo Diagram Dictionary digestive distinct heart distinct vent distinguish the class domestic Goose dorsal fin Edition Engravings eyes Fcap feelers fins fluid Flustra foot-jaws Frog front Geology gills Goose Greek Grey Lag gullet head horny Hydra insect internal anatomy intestine jointed known Latin Leech limbs Lithobius Lithobius forficatus little nervous masses Lobster lower surface lungs mantle MANUAL means membranous mouth muscular Mya arenaria nervous system opens outer pairs of legs peculiar Perch PHYSICAL GEOGRAPHY plate portion processes quadrate bone RECAPITULATION OF ESSENTIAL rings or segments rudimentary Scolecida shell side skin skull soft spines Star-fish stomach sub-kingdom sucker tail teeth tentacles thorax tion tube valve Whelk Zoology
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