Pa. 



PI. 



Pig. 



13 



iii 



1-3 



15 



iii 



4-5 



16 



iv 





3 



of cover 



3 







3 







3 







3 







3 







3 







3 







3 







3 







3 







3 







4 







4 







NORTH AMERICAN CONCHOLOGY. 61 



Name. Locality. 



Limnea megasoma Say. N. W- Terr., Vermont. 



rugosa Vul. Mexico. 



jugularis Say. N. York, Mich., N, "W. 



L. speciosus Rossm. Terr., Oregon. 



stagnalis (Sill. Journ.) 

 Paludiua rufa Eald. (pi. iii, fig. 1.) 

 Anculosa fusca Hald. Oregon. 



Ancylus (Velletea) Nuttalli Hald. Oregon. 



diaphanus Hald. Olaio. 



Limnaea ferruginea Haid. Oregon. 



Physa (Diastropha) Integra Hald. Indiana. 

 Melania varicosa Ward. Ohio. 



J\l. rufula Hald. (var. ?) 

 Bulimus vermetus Anthony. Ohio. 



Melania inflata Hald. Alabama river. 



curta Hald. Ohio river. 



Physa concolor Hald. Oregon. 



Anculosa (Mudalia) afBnis Hald. Ohio. 

 Paludiria vitula Raf. = P. Bengalensis. 

 Physa osculans = heterostropha ? 



Xo. IV.— January, 1842. 



18 V Limnea appressa Say. Lake Superior to New 



L. speciosus Ziegl. England. 



20 vi fragilis Zin. N. W. Terr., Can., Me., 



L. elodes Say. Mass., N. Y., L. Erie, 



palustris Sowb. Ohio, Pa., Oregon. 



24 vii umbrosa Say. Mo., N. Y., Ohio, Ind., 



L. elongatus Say. 111., Upper Canada. 



26 viii reflexa Say. Ohio, Ind., 111., N. Y., 



L. paliistrisva.r.distortusRoasm.. Lakes Erie and Sup. 

 ej-ilis Lea. 



28 ix 1-5 attenuata Say. Mexico. 



29 ix 6-8 expansa Hald. Vermont. 



31 X desidiosa Say. New England to Miss. 



L. obrussa Say? river; lat. 35° to 45^. 



acuta Lea. 



Philadelphica Lea. 



3 of cover Anculosa crassa //a W. Clinch river? Tenn. 



3 " Melania aequalis Hald. Nolachucky river. 



3 " uncialis Hald. Beaver cr., N. E. Tenn. 



3 " symmetrica Hald. Roanoke river, Va. 



3 " bellacrenata Hald. Alabama. 



3 " Limnea vitrea Hald. 



3 " Amnicola attenuata Hald. Montgomery Co., Va. 



