NORTH AMERICAN CONCHOLOGT. 



885 



[Proceedings of the Acad, of Nat. Sci. of Philad. — continued.'] 



Vlll 



viii 



May, 



viii 

 Ang. 



viii 



Sept. 

 viii 



Nov. 



viii 



80 



viii 



80 



viii 



80 



viii 



80 



viii 



80 



viii 



81 



viii 



81 



viii 



81 



viii 



81 



viii 



81 



viii 



81 



viii 



81 



viii 



81 



viii 



81 



viii 



81 



viii 



81 



viii 



81 



92 

 95 



1856. 



103 



1856. 



145 



is-ie. 

 213 



Locality. 



Physa triticea Lea. 

 Planorbis Traskii Lea. 

 Lymnasa proxima Lea. 

 Ancylus patelloides Lea. 



Notes on — 

 Margaritana margaritifera Lea. 

 Alasmodonta Jalcata Gould. 



Yubansis Trask. 

 Anodonta 'Wahlainatensis Lea. 

 A. triangulala Trask. 

 rotundovata Trask. 

 angulata Lea. 



A. J'l minalis Gould. 

 Eandalli Trask. 

 Helix Oregonensis Lea. 

 Nickliniana Lea. 



Calif orniensis Lea. 

 Lymneea exigua Lea. 



pallida Adams. 

 Physa heterostropha Say. 

 Melania occata hinds. 



(Paludina) seminalis Hinds. 

 Planorbis trivolvis Say. 



ammon Gould. 



Shasta County, Cal. 

 Kern Ike., TulanCo ,Ca. 

 Arroya S. Antonio, Ca. 

 Sacramento river, Cal. 



Klamath and Yuba. 



Sacramento river. 



Upper San Joaquin. 



[Co., Cai. 

 P't Cypress, Monterey 

 Tomales Bay & Dead 



Man's Island. 

 Point Cypress. 

 San Antonio Arroya. 

 San Antonio Arroya. 

 Los Angeles. 

 Sacramento river. 

 Sacramento river. 

 Horn lake. [Valley 

 Lagoons, Sacramento 



Lea. — Descriptions of twenty-four new species of Exotic 

 Uniones : by Isaac Lea. 



Unio umbrosuB Lea. |Medellin river, Mex. 



Lea. — Descriptions of four new species of Exotic Uniones: 

 by Isaac Lea. 



Unio Coloradoensis Lea. |Rio Colorado, Texas 



Lea. — Descriptions of fifteen new species of Exotic Mela- 

 niaua: by Isaac Lea. 



Melania rubida Lea. iMexico. 



Lea. — Description of the byssus in the genus Unio: by 

 Isaac Lea. 



1806. Lewis.— List of Mollusca in Little Lakes, Otsego County, 

 New York : in a letter from Dr. James Lewis. 



VoI.| Pa. I Nitmo. 



viii 259 TJnio radiatus Lam. 



viii lif)!) Anodonta ? 



viii 259 Cyclas similis Say. 

 viii 259j rhomboidea Say. 

 viii 2591 crocea S'ly. 

 viii 259 Pisidium variabile Prime. 

 viii 259, compressum Priuie. 

 25 



Vol. I Pa. I Narno. 



viii 259 Pisidium ventricosum 



I I {'f ol'lnsah V[\\) [J'rime. 

 viii|259 Lymnaea gracilis Jay. 



viii259 

 viii!259 

 viii 2G0 

 viii!260 



columella Say. 

 appressa Say. 



■ ? 



disidiosa Say. 



