THE NAUTILUS. 



57 



JJ. obliquus Lam. Decatur. 



U. orhiculatus Hild. Decatur. 



U. parvidus Lea. Mulberry River and Black Warrior Eiver. 



U. penilus Con. Coosa River, Wetumpka and Black Warrior 

 River. 



TJ. pernvalis Con. Mulberry River. 



XJ. perplexus Lea. Decatur. 



U. planus Lea. Coosa River and Fort William Shoals, twa 

 spec'iTBens. 



U. plenus Lm. Decatur. 



JJ. pyrarnidatus Lea. De^vtur. 



XJ. rectus Lam. Black Warrior IRItw. 



U. rettisus Lam. Decatur, Ala. 



U. ruhidus Lea. Black Warrior and Mulberry Rivers. 



TJ. ruhellus Lea. Black Warrior River, Warrior, common. 



U. rumphianus Lea. Black Warrior and Mulberry Rivers. 



JJ. securis Lea. Fort William Slioals, Wetumpka and Decatur. 



JJ. spams Lea. Mulberry River. 



U. sublatus Lea. Mulberry and Black Warrior Rivers. 

 . U. stahiUs Lea. Black Warrior River. 



U. tuberctdatus Barnes, Found at all river localities. 



U. vibex Conrad. Mulberry River, Blount Springs, Ala. 



XJ. vanuxemensis Lea. Wetumpka, Black Warrior and Talla- 

 poosa. 



Anodonta subvexa Con. Black AVarrior River. 



A. sp. Black Warrior River and Warrior, Ala. 



A. sp. Coosa River. 



FAMILY CORBICULID^. 



Sphserium solidulum Prime. Bucksehatchee Creek, Calera, Ala., 

 common. 



S. striatinum Lam. Black AVarrior River, and Warrior. Rather 

 scarce, muddy places. 



Muscidium contractnm Prime. A single specimen taken from the 

 Bucksehatchee Creek, Calera, Ala. 



Pisidinm virginicum Gmel. Tennessee River, Decatur, Mulberry 

 River, Blount Springs, Black Warrior River, Warrior, Ala. 



