First Book of ZoölogyD. Appleton, 1875 - 190 páginas |
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Página x
... Bivalves , 37 ; Parts of a Clam , Siphons , Currents of Water , and how they eat , 38 , 39 ; Ligament , and Internal Markings of Shell , 40 ; Byssus , 42 ; Siphonal Tubes separate , 44 ; Oysters , 45 ; Heart , Palpi , Liver , Gills ...
... Bivalves , 37 ; Parts of a Clam , Siphons , Currents of Water , and how they eat , 38 , 39 ; Ligament , and Internal Markings of Shell , 40 ; Byssus , 42 ; Siphonal Tubes separate , 44 ; Oysters , 45 ; Heart , Palpi , Liver , Gills ...
Página 31
... , with arrows drawn to indicate the direction of the currents of water . In some small species of fresh - water bivalves , the excur- rent and incurrent orifices are prolonged into tubes , and FRESH - WATER MUSSELS . 31.
... , with arrows drawn to indicate the direction of the currents of water . In some small species of fresh - water bivalves , the excur- rent and incurrent orifices are prolonged into tubes , and FRESH - WATER MUSSELS . 31.
Página 37
... bivalves , as the clam , mussel , razor - shell , oyster , scal- lop , and whatever species they can find belonging to this group . A much greater variety of forms will be found in salt - water than in fresh - water . Among some of the ...
... bivalves , as the clam , mussel , razor - shell , oyster , scal- lop , and whatever species they can find belonging to this group . A much greater variety of forms will be found in salt - water than in fresh - water . Among some of the ...
Página 38
... bivalves , one of which was shown in Fig . 37 , these openings were at the end of separate tubes . In the clam the tubes are inclosed in one sheath . The clam can protrude this apparatus to a length equal- ing that of the shell two or ...
... bivalves , one of which was shown in Fig . 37 , these openings were at the end of separate tubes . In the clam the tubes are inclosed in one sheath . The clam can protrude this apparatus to a length equal- ing that of the shell two or ...
Página 39
... bivalves depend upon currents of water to convey their food to them . While , in the snails , the creatures could go in quest of food , having the power of protruding the head from the shell , and their mouths furnished with means to ...
... bivalves depend upon currents of water to convey their food to them . While , in the snails , the creatures could go in quest of food , having the power of protruding the head from the shell , and their mouths furnished with means to ...
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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