O PEOCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



Distinguished from M. Morchi, Brot, also from West Africa, by its 

 much more subulate form and the flatness of its whorls ; it is also 



more coarsely spirally striate, and the sutures are much less well 

 defined than is the case with that species. 



HlPPONYX SALEBEOSUS, U.Sp. 



Shell irregularly conical, white, calcareous, bearing traces round 

 the margin of irregular radiate ribs ; interior of shell pale greenish- 

 white ; apex solid and massive ; margin acute. 



Alt. 10, diam. maj. 12 mm. 



Hob. — Gold Coast. 



The generally rugged appearance of this species, together with its 

 conical form and thickened apex, easily separate it from any other 

 hitherto described species of Sipponyx. 



The dimensions given above refer only to the type-specimen ; in 

 the large number of individuals examined the measurements vary 

 enonnously owing to their irregular shape. 



