GINGULA. Panama Shells. 181 



251. Rissoa - -. Sp. indet. 



The sculpture of this shell shows it to be distinct from any 

 others which we have enumerated : but the apex and the lip 

 are both defective in the single specimen found at Panama. 



Family TKOCHnLE. 



252. Cingula (I) iiiconspicua. Nov. sp. 



Shell ovate fusoid : white : with several spiral ridges, of which 

 four are seen on the penult whorl, and of which the upper two 

 are less prominent ; anteriorly the ridges are also less promi- 

 nent ; with transverse ridges decussating the upper spiral ridges 

 and terminating at the third : apex subacute : spire with the 

 outlines a little curvilinear : whorls five, a little convex, with 

 a well impressed suture ; last whorl small : aperture small, 

 ovate, acute above : labrum rather thin : labium well developed : 

 umbilical region a little indented. 



Mean divergence about 30 ; length .065 inch ; breadth .035 

 inch ; length of spire .045 inch. 



Some authors would refer this species to Rissoa : but the aper- 

 ture is Turbinoid rather than Melanoid. 



Station. Unknown. 



Habitat. Panama ; C. B. A. ! 



3 specimens were found in the calcareous sand. 



253. Cing-ula paupercula. Nov. sp. 



Shell conoid : dingy white, sometimes with a pale brown spi- 

 ral stripe on the middle of the whorls : surface smooth : apex 

 subacute : spire with the outlines nearly rectilinear : whorls 

 five, planulate, with a well impressed suture : aperture broadly 

 ovate : labrum slightly thickened : labium well developed : 

 umbilicus very minute. 



