CHEMNITZIA. Panama Shells. 169 



near : whorls eleven, convex, with a rather deep suture : last 

 whorl rather long, with the periphery well rounded : aperture 

 subovate : labrum thin : columella straight : umbilicus wanting. 

 Mean divergence about 17 ; length .17 inch ; breadth .045 

 inch ; length of spire .13 inch. 



Station. Unknown. 



Habitat. Panama; C. B. A. ! 



2 specimens were found in the sand. 



229. Chemiiitzia striosa. Nov. sp. 



Shell long, conic : yellowish brown : with, on each whorl, 

 about forty very minute slender ribs, which gradually become 

 obsolete on the periphery of the last whorl ; covered with dis- 

 tinct spiral striae, of which one a little below the suture and also 

 those which are anterior are larger : spire with the outlines 

 nearly rectilinear : whorls ten, slightly convex, with a well 

 impressed suture : aperture ovate, acute above : labrum thin : 

 columella a little twisted : umbilicus wanting. 



Mean divergence about 20 ; length .21 inch : breadth .06 

 inch; length of spire .16 inch. 



Station. Unknown. 



Habitat. Panama ; C. B. A. ! 

 1 specimen was found in the sand. 



230. Chemiiitzia turrita. Nov.sp. 



Shell subcylindric in the lower whorls, conic in the upper 

 whorls : white : with, on each whorl, about eighteen sharp 

 compressed slender ribs, which are less prominent on the last 

 whorl, and terminate abruptly at its periphery ; with an impressed 

 spiral line next below the upper margin of the whorls, another 

 at the periphery of the last whorl, and an anterior spiral groove : 

 spire with the outlines curvilinear above the middle, otherwise 

 nearly rectilinear : whorls ten, acutely shouldered, slightly con- 



JULY, 1852. 12 ANN. LTC. NAT. HIST. 



