First Book of ZoölogyD. Appleton, 1875 - 190 páginas |
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Página 5
... SHOWING LINES OF GROWTH RUNNING PARALLEL TO THE EDGE OF THE APERTURE . The shell is increased in size by successive layers of shelly matter added to the borders of the aperture . In this way the shell grows . A clearer idea of the ...
... SHOWING LINES OF GROWTH RUNNING PARALLEL TO THE EDGE OF THE APERTURE . The shell is increased in size by successive layers of shelly matter added to the borders of the aperture . In this way the shell grows . A clearer idea of the ...
Página 17
... SHOWING SNAIL WITH TENTACLES RETRACTED , A ; AND TENTACLES PROTRUDED , B. 16. Something may now be learned as to the way in which land snails eat . By placing before the snail the tender leaves of lettuce or cabbage , the head will be ...
... SHOWING SNAIL WITH TENTACLES RETRACTED , A ; AND TENTACLES PROTRUDED , B. 16. Something may now be learned as to the way in which land snails eat . By placing before the snail the tender leaves of lettuce or cabbage , the head will be ...
Página 20
... showing the young snails as they appear within the egg . Dog Poo boboo α b с FIG . 24. — a , Cluster of Eggs of a Fresh - Water Snail ; b , c , Eggs enlarged , showing the young Snails within the Eggs . With the aid of a magnifying ...
... showing the young snails as they appear within the egg . Dog Poo boboo α b с FIG . 24. — a , Cluster of Eggs of a Fresh - Water Snail ; b , c , Eggs enlarged , showing the young Snails within the Eggs . With the aid of a magnifying ...
Página 23
... SHOWING LONG CANAL . This notch is called the canal , and in some species it is very short , while in other species it is very long , as in Fig . 27 . The mantle of the animal is prolonged in a fold which occupies this canal , and is ...
... SHOWING LONG CANAL . This notch is called the canal , and in some species it is very short , while in other species it is very long , as in Fig . 27 . The mantle of the animal is prolonged in a fold which occupies this canal , and is ...
Página 26
... showing Outlet , o , through which the Young escape ; s , Stem , The common cockle sticks its separate egg - capsules side by side upon the rock ( Fig . 33 ) . The beach - cockle deposits its eggs in a broad 26 FIRST BOOK OF ZOOLOGY .
... showing Outlet , o , through which the Young escape ; s , Stem , The common cockle sticks its separate egg - capsules side by side upon the rock ( Fig . 33 ) . The beach - cockle deposits its eggs in a broad 26 FIRST BOOK OF ZOOLOGY .
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Palavras e frases frequentes
551 Broadway abdomen adductor animal antennæ aperture appearance appendages APPLETON attached beetle bird bivalves body bones breathe air butterfly called canker-worm caterpillar cephalo-thorax chrysalis clam claws collected common compound eyes crab crawfish crawling creature creeping disk crustaceans deposit edge eggs examine eyes flattened following figure represents foot fresh-water mussels fresh-water snails gills grass grasshopper hatch head hind-leg hinder insects jaws jointed legs labium land snails larva larvæ Let the pupils ligament lines of growth lobster mandibles mantle maxillæ metatarsus moults mouth mouth-parts muscles mussel myriopods natural nests number of segments operculum oyster pairs of legs palpi palpus portion Price Prof pupa salamander salt-water seen separate shed shell showing side siphon skin species specimens spiders spinnerets spiracles stages surface tentacles thorax thread true insects tube valves vertebral vertebral column wings worms young