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BIBLIOGRAPHY OP 



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Unio Sayii Ward. 

 securis Lea. 



U. depressa? Raf. 

 siliquoideus Barnes. 



U. inflatus Barnes (fern.) 

 Bulcatus Lea (male). 



U. ridibundus Say (fern.) 

 triangularis Barnes. 

 U. cuneatus Swains. 

 formosus Lea (male). 

 triqueter? Raf. 

 tuberculatus Barnes. 

 U. tuberculosus Val. 

 verrucosa Raf. 

 undatus Barnes. 

 U. caridiacea Say. 

 mytiloides Raf. 

 ohliqua Lam. 

 pyramidatus Lea, 

 undulatus Barnes. 

 U. heros Say. 



niuhiplicatus Lea. 

 ventricosus Barnes. 

 U. cardium '? Raf. 



occicZens Lea (female). 

 subovatus Lea (male). 



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Unio verrucosus Barnes. 





U. tuberculata Raf. 





graniferus Lea. 



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Alasmodonta ambigua Say 





Unio Hildrethianus Lea. 



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calceola Lea. 





A. deltoidea? Lea. 





Unio calceola Lea. 



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confragosa Say. 



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complanata Barnes. 



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rugosa Barnes. 





A. costata Raf. 



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truncata Say. 



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Anodonta areolata Swains. 





Alas, edentula Say. 



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Ferussaciana Lea. 



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imbecilis Say. 





A. incerta Lea. 



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pavonia Lea. 





A. Wardiana Lea. 



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plana Lea. 





A. decora Lea (young). 





grandis ? Say. 





gigantea Lea. 



-Catalogue of Shells witli descriptions of New Species: 

 by Dr. A. A. Gould. (From Agassiz's Lake Superior, Boston, 

 1850.) 



[Localities are given, and descriptions of those specified as new. — 

 W. G. B.] 



Helis electrina Gould. 



chersina Say. 

 Vitrina limpida Gould (n. s.) 



V. pellucida Say. 

 Succinea ovalis Gould. 



obliqua Say. 



avara Say. 

 Physa heterostropha Say. 



vinosa Gould (n. sp., pi. 

 Tii, fig. 10, 11). 



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Helix albolabris Say. 



243 



243 



tridentata Say. 



243 



243 



thyroidus Say. 



243 



243 



alternata Say. 





243 



palliata Say. 



243 



243 



monodon Rack. 



243 



243 



perspectiva Say. 



243 



243 



striatella Anthony. 



243 



243 



concava Say. 



244 



243 



arbor ea Say. 





