THE NAUTILUS. 



VOL. XXII. JANUARY, 1909. No. 9. 



NEW AMNICOLID.E FROM ALABAMA. 

 BY BRYANT WALKER. 



In the fall of 1907 Mr. Herbert H. Smith explored about twenty- 

 five miles of the Coosa River, lying between Chilton and Coosa 

 counties. Amnicolides were very abundant, and more than 15,000 

 specimens have been passed under examination. Among them were 

 the several species herein described, which appear to be new. 



The principal collecting points were Cedar Island, three miles 

 above "Waxahatchee Creek (in THE NAUTILUS, xxi, p. 128, this 

 island was erroneously stated to be that distance above Yellowleaf 

 Creek); The Bar, two miles further down stream, and two and one- 

 half miles above Yellowleaf Creek (the second creek of that name); 

 Butting Ram Shoals, five miles below The Bar; Higgins Ferry, 

 seven miles further down; and Duncan Riffle, seven miles below the 

 Ferry. Duncan Riffle is about twenty-four miles above Wetumpka. 

 This interval still remains for some enterprising collector to explore. 



All of the Coosa River species collected by Hinkley were also 

 found by Smith, with the exception of Som. aurens. S. hinkleyi, 

 crassus and nanus occurred in great quantity, the latter being the 

 most numerous. S. coosaensis, obtusus and aldrichi were less abund- 

 ant, but were fairly common in some localities. S. constricts still 

 remains the rarest of the Coosan Somatogyri, a bare half-dozen rep- 

 resenting the total catch. An interesting "find" was that of S. 

 substriatus, originally collected by Hinkley at Florence, Ala., and 

 Columbus, Miss. 



As none of the Amnicolida collected by Mr. Smith in his journey 



