64 Panama Shells. PURPURID-E. 



Habitat. Atlantic Ocean, on the shores of Africa; Kiener. 

 "Bay of Montija, West Columbia;" Coming! 



Reeve. 



Payta ; Petit in sched. 

 Taboga and Panama ; C. B. A. ! 

 22 specimens were collected. 



51. Itfassa Paiiameiisis Nov. sp. 



Shell long ovate conic : bluish olivaceous, with a whitish 

 spiral line below the middle of the whorls ; colors more dis- 

 tinct on the ribs ; whitish near the upper part of the labrum ; 

 anteriorly with a pale spiral band, which is sometimes obso- 

 lete: with, on each whorl, about eleven narrow acute ribs, 

 which are obsolete anteriorly ; with very minute spiral striae, 

 which are less distinct below the middle of the whorls : spire 

 with the outlines moderately curvilinear : apex acute : whorls 

 eight, slightly convex, with a distinct suture ; last whorl not 

 ventiicose : aperture elliptical ; labrum thickened by a stout 

 varix : labium thickened but not appressed : notch deep. 



Mean divergence about 37 ; length .58 inch ; breadth .25 

 inch ; length of spire .35 inch 



Station. Under stones, a little above low water mark, in 

 company with several species of Columbella, 



Habitat. Panama ; C. B. A. ! 



We collected about 1500 specimens on the reef. 



52. Nassa proxlma. Nov. sp. 



[ Shell like that of N. versicolor (v. infra), but much more 

 slender, with the ribs less prominent, and very densely covered 

 with very minute uninterrupted stria?, which give a silky 

 lustre to the surface. 



Mean divergence about 38; length .44 inch ; breadth .21 

 inch ; length of spire .28 inch. 



