CHEMNITZIA. Panama Shells, 167 



224. Cliemnitzia gracilior. Nov. sp. 



Shell very long, conic : very pale yellowish brown : with, on 

 each whorl, about twenty-eight slender ribs, which terminate 

 abruptly just below the periphery of the last whorl : with a 

 well impressed spiral line next behind the anterior termination 

 of the ribs, and a few obsolete spiral striae ; spire with the out- 

 lines nearly rectilinear except near the apex : whorls twelve, 

 slightly convex, with a well impressed suture : aperture ovate, 

 acute above : labrum very thin : columella a little curved ; 

 umbilicus wanting. 



Mean divergence about 13 ; length .31 inch ; breadth .06 

 inch ; length of spire .255 inch. 



Station. Unknown. 



Habitat. Panama ; C. B. A. ! 



2 specimens were found in the sand, 



225. Chemnitzia major. Nov. sp. 



Shell conic, long : dingy white : with, oa each whorl, about 

 twenty-four stout obtuse approximate ribs, which are obsolete 

 anteriorly ; with lightly impressed fine spiral striae over all the 

 surface except the summits of the ribs : spire with the outlines 

 rectilinear: whorls fifteen, moderately convex, with a well 

 impressed suture : aperture subovate : labrum thin : columella 

 nearly straight : umbilicus wanting. 



Mean divergence about 17 ; length .38 inch ; breadth .09 

 inch ; length of spire .31 inch. 



Station. Unknown. 



Habitat. Panama ; C. B. A. ! 

 1 specimen only was found. 



226. Chemnitzia marginata. Nov. sp. 

 Shell fusiform cylindric ; dingy white : with, on each whorl, 



