First Book of ZoölogyD. Appleton, 1875 - 190 páginas |
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Página ix
... 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 • . 27 CHAPTER VI ...
... 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 • . 27 CHAPTER VI ...
Página 9
... crawls or glides slowly along , by means of the foot . The two little horns or feelers , in front , are called tenta ... crawling to the surface of the water to breathe air . The snail ac- complishes this by raising the outer edge of the ...
... crawls or glides slowly along , by means of the foot . The two little horns or feelers , in front , are called tenta ... crawling to the surface of the water to breathe air . The snail ac- complishes this by raising the outer edge of the ...
Página 11
... crawling up , to get a fresh supply of air ; and Jis a water - breather , having gills , but no lung . 10. Among the ... crawls , this scale FRESH - WATER SNAILS . 11.
... crawling up , to get a fresh supply of air ; and Jis a water - breather , having gills , but no lung . 10. Among the ... crawls , this scale FRESH - WATER SNAILS . 11.
Página 12
Edward Sylvester Morse. the body . When the snail crawls , this scale will be seen just behind the shell , as in Fig . 15 , 0 . This scale is called the operculum , and when the snail has contracted , or drawn within the shell , the ...
Edward Sylvester Morse. the body . When the snail crawls , this scale will be seen just behind the shell , as in Fig . 15 , 0 . This scale is called the operculum , and when the snail has contracted , or drawn within the shell , the ...
Página 15
... crawls along , leaves a slimy trail af- ter it . This trail consists of a fluid , which not only flows . from the ... crawl on it , a good view may be obtained of the peculiar movements of this creeping disk , by looking through the ...
... crawls along , leaves a slimy trail af- ter it . This trail consists of a fluid , which not only flows . from the ... crawl on it , a good view may be obtained of the peculiar movements of this creeping disk , by looking through the ...
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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