The American Naturalist, Volumen3Essex Institute, 1870 |
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Página 6
... represented , two or three for the most part clothe the prairies . These are the Compositæ , the Cyperaces and the Gramineæ ; or , to use plain English , the compound flow- ers , the sedges and the grasses . Let us take a glance at our ...
... represented , two or three for the most part clothe the prairies . These are the Compositæ , the Cyperaces and the Gramineæ ; or , to use plain English , the compound flow- ers , the sedges and the grasses . Let us take a glance at our ...
Página 24
... represented a clam in its natural position in the mud , showing the extent to which the tubes , or siphons , can be ... represents a section of the valves of a clam , showing the elastic substance , L , and the transverse muscle , M ...
... represented a clam in its natural position in the mud , showing the extent to which the tubes , or siphons , can be ... represents a section of the valves of a clam , showing the elastic substance , L , and the transverse muscle , M ...
Página 25
... represents the heart as seen from above . This con- sists of a ventricle ( v ) and two auricles ( A ) , one on each side , which takes the blood from the gills . The gills are two in number , and hang from below the back , on each side ...
... represents the heart as seen from above . This con- sists of a ventricle ( v ) and two auricles ( A ) , one on each side , which takes the blood from the gills . The gills are two in number , and hang from below the back , on each side ...
Página 26
... represents the natural attitude of the Unio , or fresh - water clam . It will be seen that the tubes are above the level of the sand . The foot is very large , and with it the Unio is enabled to move along slowly , the shell wedging its ...
... represents the natural attitude of the Unio , or fresh - water clam . It will be seen that the tubes are above the level of the sand . The foot is very large , and with it the Unio is enabled to move along slowly , the shell wedging its ...
Página 27
... represents the clam with its back uppermost , and the anterior end turned to the left . Fig . 2. Sea - clam in its natural position in the mud , head downward , showing the tubes extended to the surface of the mud . Fig . 3. Ideal ...
... represents the clam with its back uppermost , and the anterior end turned to the left . Fig . 2. Sea - clam in its natural position in the mud , head downward , showing the tubes extended to the surface of the mud . Fig . 3. Ideal ...
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Términos y frases comunes
abundant allied AMER American animal Antedon appearance aquarium beautiful birds body breeding coast collected color common crab Cretaceous Crustacea described Desmids Downy Woodpecker dredge eastern eggs embryo England entomologists F. W. Putnam fact farther feet female fish Florida flowers Fort Benton Fort Colville fossil fresh-water genera genus Geology grass ground growing habits head hole hundred inches Indian insects islands known larva larvæ latter leaves legs length living locality male Massachusetts miles mites mollusks Mottled Owl mound Natural History NATURALIST nearly nest O. C. Marsh observed obtained pair parasitic peculiar plants plates present probably Prof rare region remarkable resembling river rocks Rocky Mountains sand season seen shell side skin snake species specimens spider summer surface tail tank tion trees valley vegetable W. H. DALL Warbler western winter wood young