23 



S. cylindraceum, Highels. " Warrior river." 



S. deinissurn. Anthony. ? 



S. ellipticum, Antli. Coosa river. 

 S. excisum, Lea. "Alabama." 

 S. glandulum, Lea. Coosa river. 

 S. glans, Lea. Coosa river. 

 S. incisum, Lea. "Alabama." 

 S. laciniatum, Lea. " Tuscaloosa-" 

 S. Lewisii, Lea. Coosa river. 

 S. nuculum, Antli. Coosa river. 



S. ovoideum, Shuttleworth. ? 



S. pagoda, Lea. *' Tuscaloosa ;" Coosa river. 

 S. pumilum, Lea. "Alabama ;" Coosa river. 



S. pyramidatum, Shuttkworth. ? 



S. salebrosum, Antli. Coosa river. 



S. Showalteriana, Lea. Coosa river. 



S. sphsericum, Anth. Coosa river. 



S. Wetumpkaense, Lea. Coosa river. [Querie, var. or 



youDg of pagoda?] 

 S. Wheatleyi, Lea. Coosa river. 



Sub-genus ANCULOSA, Say. 



A. ampla, Anthony. Cahawba river ; Coosa river ; Buck 

 creek ; Shoal creek.* 



A. contorta, Lea. Coosa river. [Querie, Lith. compac- 

 ta, Anth.'] 



A. Coosaensis, Lea. Coosa river. 



A. Downiei, Lea. Coosa river. (Also found in Georgia.) 



A. ligata, Anth. Tennessee river. 



A. melanoides, Con. "N. Alabama." 



A. picta, Con. Alabama, Coosa and Cahawba rivers, 



A. plicata, Con. Black Warrior river. 



A. prserosa, Say. Tennessee river. [Varieties are num- 

 erous.} 



A. rubiginosa, Lea. " Warrior river ;" Coosa river. 



A. Showalterii, Lea. Coosa river. 



A. squalida, Lea. " Tuscaloosa." 



* In (3 reeks a small, black variety is found. 



