First Book of ZoölogyD. Appleton, 1875 - 190 páginas |
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Página ix
... Mussel , 29 ; How they crawl , 30 ; Excurrent and Incurrent Orifices , 31 ; Siphons , Mantle , 32 ; How Pearls are formed , 33 ; Internal Markings of Shell , Hinge , 34 ; How the Shells open and Ligament acts , 36 . PAGE 1 -च 7 14 21 ...
... Mussel , 29 ; How they crawl , 30 ; Excurrent and Incurrent Orifices , 31 ; Siphons , Mantle , 32 ; How Pearls are formed , 33 ; Internal Markings of Shell , Hinge , 34 ; How the Shells open and Ligament acts , 36 . PAGE 1 -च 7 14 21 ...
Página 2
... mussel - shells , also , will prob- ably be collected . FIG . 2. - FRESH - WATER MUSSEL - SHELL . These are to be reserved for future examination . Those having a spiral turn or twist are called snail shells 2 FIRST BOOK OF ZOOLOGY .
... mussel - shells , also , will prob- ably be collected . FIG . 2. - FRESH - WATER MUSSEL - SHELL . These are to be reserved for future examination . Those having a spiral turn or twist are called snail shells 2 FIRST BOOK OF ZOOLOGY .
Página 28
... mussel , that is , a mussel in which the valves are united in this way , and he will observe that they are connected by a brownish substance , which is quite elastic when the shell is alive , but becomes brittle when dried . The shells ...
... mussel , that is , a mussel in which the valves are united in this way , and he will observe that they are connected by a brownish substance , which is quite elastic when the shell is alive , but becomes brittle when dried . The shells ...
Página 29
... mussel - shell in his hand ( that is , a mussel in which both valves are together , and united across the back ) , with the ligament uppermost , and the umbone away from him , or beyond the ligament , and the valve on his left hand is ...
... mussel - shell in his hand ( that is , a mussel in which both valves are together , and united across the back ) , with the ligament uppermost , and the umbone away from him , or beyond the ligament , and the valve on his left hand is ...
Página 30
... mussel . By following such a furrow , the mussel that made it will soon be found . Fig . 36 represents the appearance of a common fresh- water mussel in the act of crawling . магист FIG . 36. - SHOWING POSITION OF MUSSEL WHEN CRAWLING ...
... mussel . By following such a furrow , the mussel that made it will soon be found . Fig . 36 represents the appearance of a common fresh- water mussel in the act of crawling . магист FIG . 36. - SHOWING POSITION OF MUSSEL WHEN CRAWLING ...
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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