62 Panama Shells, puRPURiDifi. 



moderately convex, with a distinct suture ; last whorl ventri- 

 cose, with a narrow deep spiral canal anteriorly : aperture 

 subelliptioal : labrum subacute, thickened with a stout varix, 

 within with about five acute spiral ridges : labium well 

 thickened, not appressed : notch deep. 



Mean divergence about 55° ; length .5 inch ; breadth .31 

 inch ; length of spire .28 inch. 



Var. a ; with the color nearly black. 



Station. — Unknown. 



Habitat.— Tahoga. ; C. B. A. ! 



32 specimens were collected. IZ 



48. IVassa luteostoma. 



Synonymy. 



Ji/'assa luteostoma Bred. <fe Sowb. in Zool. Journ. IV. 376. 1829. 



Buccinum Kioner Iconog. p. 110. pi. 30. f. 1. 



Nassa xanthoatoma Gray in Zool. Beech. Voy. pi. 36. f. 3. 



(parva.) 1839. 



Souleyet (?) Voy. Bonite. Moll. pi. 41. 



f. 5-7. - - 1844? 

 luteostoma Reeve Elem. Conch, pi. 3. f. 11. 1846. 



xanthosiomaMva. Qia,yMoVi.^l. 85a. i. 6. {soft parts.) 1850. 



Station. — On sand, usually not far below high water mark, 

 in places where water is running during the recess 

 of the tide : also in similar places not far above 

 low water mark. 



Habitat. — Senegal ; Kiener : also Jay. 



Real Llojos, and Acapuloo ; Lesson. 



Mazatlan ; Melchers ! Menke. 



Panama; E. Jewett! Gould Mss. 



Panama ; C. B. A. ! 

 We collected 330 specimens, mostly near the sea wall of 

 Panama. " M. Kiener indique le Senegal pour patrie ^ cette 



