NASSA PUMILA. 87 



Nassa Kennardi, sp. nov. Plate V, fig. 11. 



Specific Characters. — Shell rather small, ovato-conical; whorls 6, slightly convex, 

 regularly tapering, the last more than half the total length ; ornamented by 8 

 longitudinal ribs, prominent and rounded, which are flexuous on the body-whorl 

 and nearly reach the base of the shell ; the ribs are crossed by closely set spiral 

 ridges which do not cause tuberculation at the point of intersection ; suture deep ; 

 mouth oval, angulate above ; outer lip thin, curved ; inner lip forming a glaze 

 adherent to the pillar ; canal open, short, notched. 



Dimensions. — L. 13 mm. B. 6 mm. 



Distribution. — Not known living. 



Fossil : Waltonian Crag : Little Oakley. 



BemarJis. — The interesting fossil here figured, of which I have found but one 

 specimen during my many visits to Oakley, is strikingly different to any other of 

 the Crag Nassas. It belongs to some group hitherto unrepresented in our East 

 Anglian deposits. 



Var. elongata, nov. Plate V, figs. 12, 13. 



Dimensions. — L. 18 mm. B. 8 mm. 



Distribution. — Not known living. 



. Fossil : Waltonian Crag : Little Oakley. Poederlien : Antwerp. 



Reniarlis. — Examining the collection of Mr. van de Wouver, I noticed some 

 specimens of an undescribed species of Nassa which, differing in some respects 

 from N. Kennardi, may probably be a variety of that species. I have several 

 fragments of what seems the same thing from Oakley, but as they are not so 

 nearly perfect as the Belgian fossil, I figure both. The shells in question are 

 nearer to N. Kennardi than to any other species of the Crag Nassas. 



Nassa pumila, sp. nov. Plate V, fig. 24. 



Specific Characters. — Shell very small, strong, ovato-conical ; whorls 4, somewhat 

 convex, rapidly diminishing in size, the last tumid, two-thirds the total length ; 

 ornamented by about 15 well-marked longitudinal costse, not so wide as the 

 intervening spaces, and by fine spiral lines which cause partial granulation where 

 they cross them ; spire very short ; suture deep ; mouth ovate ; outer lip thickened 

 outside by a wide rib, grooved within ; inner lip strong and strongly toothed ; canal 

 wide, very short. 



Dimensions. — L. 7"5 mm. B. 5 mm. 



Distribution. — Not known living. 



Fossil : Waltonian Crag : Little Oakley. 



EemarJcs. — At first sight the shell here figured might be regarded as a variety 



