NORTH AMERICAN CONCHOLOGY. 



33 



Page. PI. Fig. Is'ame. 



50 xxvii 1 Unio gibbosus Raf. 



U. torulosus Raf. 

 perplexus Lea. 



51 xxvii 2 gibbosus var. perobliquus. 



52 xxviii teres Maf, 



U. anodontoides Lea. 



53 xxix 1 Sageri Conr. 



54 xxix 2 lapillus Say. 



U. fabalis Lea. 



55 XXX fragilis Raf. 



U. gracilis Barnes. 

 Si/mphynota gracilis Lea. 



56 xxxi alatus Say. 



Metaptera megaptera Raf. 

 Symp, alata Lea. 



Xo. Til.— December, 1836. 



57 xxxii Unio inflatas Lea. 



Symphynota inflata Lea. 

 U. Alabamensis Conr. 



58 xxxiii leptodon Raf. 



U. planus Barnes. 



Anodonta purjmrescens Sw. 



Symphynota tenuissima Lea. 

 GO xxxiv 1 ellipsiformis Conr. 



60 xxxiv 2 lienosus C'>nr. 



U. Nashvillianus Lea. 

 G2 XXXV 1 stapes Lia. 



63 XXXV 2 intermedius f'onr. 



64 xxxvi 1 occidentalis Conr. 



Locality. 

 Wabash, Scioto, and 

 Tenn. rivers. 



Wab'sh, Ind., Detroit. 

 West, rivs., La., Ala. 



Detroit river. 

 Michigan, Ohio river. 



Fox and Detroit, Ala. 



Wise, Mich., Ala., N. 

 W. Terr., Fox riv. 



Alabama. 



Wise, Ala., Scioto 

 rivers. 



Michigan. 



Greene Co., Alabama. 



Alabama. 



Nolachucky riv., Ten. 

 Currant river. Ark. 



Xo. YIII.— February. 183t. 



65 xxxvl 2 Unio collinus Conr. North river, Va. 



66 xxxvii 1 SoTverbianus Lea. Cumberlnnd river, 



{('. 7>i7. us Conr., note on p. 69, Tenn., Elk riv., Ala. 

 N. F. W. S.) 



C8 xxxviii 1 



60 

 70 

 71 



xxxvm 

 xxxix 



xl 



politus Say. 



C. suhrotundus Lea. 

 nexus Say. 



U. ararformis Lea. 

 Greenll Conr. 

 Shepardianus L^a. 

 compressuB I><sh. 



Syuiplnjiiola dipressa Lea. 



Cumberland river, 



Tenn. 

 Bl. Warrior riv., Ala. 

 Aitamalia river, Ga. 

 Ohio, New York. 



