NASSA. Panama Shells. 61 



Station. — Unknown. 



Habitat. — Panama ; E. Jewett ! Gould Mss. 

 Taboga and Panama ; C. B. A. ! 

 17 specimens were obtained. 



40. IVassa g^einmiilosa.— 'Nov. sp. 



Shell ovate conic, ventricose : whitish, more or less tinged 

 with yellowish brown ; with a narrow spiral stripe of brown 

 at the upper margin of the whorls, and another anteriorly ; 

 with two or three minute spiral brown lines on the middle of 

 the last whorl, which are interrupted by the nodules : with 

 about fifteen or sixteen minute ribs on each whorl, and spiral 

 raised lines, of which three or four are visible on the spire ; 

 with the intersections developed into well rounded nodules : 

 spire with the outlines rectilinear: apex very acute : whorls 

 seven, a little convex, with a distinct suture ; last whorl spi- 

 rally subcanaliculate anteriorly : labrum subacute, well thick- 

 ened by a varix, coarsely ridged within : labium much arcuated, 

 a little thickened but not appressed : notch deep. 



Mean divergence about 56° ; length .25 inch ; breadth .17 

 inch ; length of spire .15 inch. 



Station. — Unknown. 



Habitat. — Panama ; C. B. A. ! 

 1 specimen was obtained. 



47. IVassa glauca.— Nov. sp. 



Shell ovate conic, ventricose ; glaucous or olivaceous, with 

 a broad spiral stripe of dingy white a little above the suture, 

 whitish about the aperture, deeply colored in the anterior spi- 

 ral canal : with, on each whorl, about ten ribs, of which the 

 last two or three next to the aperture are nearly obsolete ; 

 with many spiral striae, which traverse the ribs : spire with 



the outlines nearly rectilinear : apex acute : whorls eight, 

 16 



