Transactions of the American Philosophical Society, Bind 5;Bind 11American Philosophical Society, 1837 Held at Philadelphia for promoting useful knowledge. |
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Side 25
... genus Cyclas I have given but little attention , but believe the same observa- tions may be extended to this species . What an interesting field do these facts spread open to the inquiring philosopher ! Why should the streams which flow ...
... genus Cyclas I have given but little attention , but believe the same observa- tions may be extended to this species . What an interesting field do these facts spread open to the inquiring philosopher ! Why should the streams which flow ...
Side 38
... genus . It re- sembles most the U. rubiginosus ( nobis ) in outline , but differs from it in being more rounded on the inferior and posterior portions of the margins , as well as in the cardinal tooth being more elevated and more deeply ...
... genus . It re- sembles most the U. rubiginosus ( nobis ) in outline , but differs from it in being more rounded on the inferior and posterior portions of the margins , as well as in the cardinal tooth being more elevated and more deeply ...
Side 42
... genus , Symphynota , notwithstanding their great globosity . It is more capacious than any of the Naïades I have seen , and the light yellow or straw coloured epidermis is very peculiar - in form it most resembles , perhaps , the Unio ...
... genus , Symphynota , notwithstanding their great globosity . It is more capacious than any of the Naïades I have seen , and the light yellow or straw coloured epidermis is very peculiar - in form it most resembles , perhaps , the Unio ...
Side 42
... genus which has come under my notice , and is remarkable for its great area , its inflation of the region of the beaks , its smooth epidermis , its splendid rays and ex- quisitely beautiful nacre , which no pencil can imitate . I have ...
... genus which has come under my notice , and is remarkable for its great area , its inflation of the region of the beaks , its smooth epidermis , its splendid rays and ex- quisitely beautiful nacre , which no pencil can imitate . I have ...
Side 46
... genus with so few tangible characters induced me to lay this aside with some other species until more leisure would permit a thorough examination . It perhaps most closely resembles the A. cataracta of Say , but differs from it ...
... genus with so few tangible characters induced me to lay this aside with some other species until more leisure would permit a thorough examination . It perhaps most closely resembles the A. cataracta of Say , but differs from it ...
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