EISSOA. Panama /Shells. 179 



247. Rissoa in (requeue. Nov. sp. 



Shell very long, ovate conic: white: with, on each whorl, 

 sixteen very obtuse slightly elevated indistinct ribs, which are 

 separated only by stria?, and a few microscopic revolving stride : 

 apex subacnte : spire with the outlines nearly rectilinear : 

 whorls seven, contracted above, otherwise convex or subangular 

 with a moderately impressed suture ; last whorl long, subangu- 

 lar : aperture oblique, subovate, scarcely effuse : labrum much 

 excurved, well thickened : umbilicus wanting. 



Mean divergence about 23; length .24 inch; breadth .075 

 inch ; length of spire .18 inch. 



Station. Unknown. 



Habitat. Panama ; C. B. A. ! 



1 specimen was obtained. 



248. Rissoa Jamis. Nov. sp. 



Shell long, ovate conic : white : anteriorly with fine crowded 

 spiral striae ; elsewhere covered with small crowded transverse 

 ribs, which on the last whorl appear merely as transverse strias 

 becoming obsolete near the periphery : apex acute : spire with 

 the outlines moderately curvilinear: whorls nine, moderately 

 convex, with a lightly impressed suture : aperture large, oblique, 

 moderately effuse below, more deeply effuse above : labrum 

 much advanced along the middle, thickened by a broad stout 

 varix : umbilicus wanting. 



Mean divergence about 30 ; length .19 inch ; breadth .07 

 inch ; length of spire .115 inch. 



/Station. Unknown. 



Habitat. Panama ; C. B. A. ! 



2 specimens were found in the sand. 

 Var. a is larger, being .24 inch long. 



