200 Panama Shells. 



Family TOKNATELLIDJE. 

 293. Pyramitlella. Sp. indet. 



A snow white shell, of which 1 specimen was found near 

 Panama. It is probably a young shell, having only eight 

 whorls. 



294. Pyramidella coiiica. Nov. sp. 



Shell long, regularly conic : white on the upper whorls, dark 

 brown on the others, with a pale spiral line just above the 

 suture : surface smooth and shining : apex very acute : spire 

 with the outlines rectilinear : whorls fourteen, flat, with the 

 suture in a narrow deep groove : last whorl sharply angulated 

 at the periphery : aperture oblique : labrum thin : columella 

 with three plaits, of which the one is lamelliform, and the other 

 two are very small. 



Mean divergence, about 23 : length .52 inch ; breadth .175 

 inch ; length of spire .88 inch. 



This species is remarkable for the exact conical form of the 

 spire. 



Station. Unknown. 



Habitat. Panama ; C. B. A. ! 

 1 specimen was found. 



Family NEEITIDJE. 



IfATICA. We are deterred from the description of any 

 indeterminate species in this genus, because several species, 

 which belong to the same zoological province, are known to us 

 only by brief descriptions. Even the species which was 

 obtained most plentifully, we have not been able to determine ; 

 yet from its abundance, it must be well known. Monographs 

 of Natica and Nerita are now greatly to be desired. 



The success with which M. Recluz has devoted himself to 

 this and to the allied genera is well known. By the thorough 



