642 MR. E. A. SMITH 01!^ TTVO KEW SPECIES OF ETWEA. [NoV. 7, 



4. Descriptions of two new Species of Shells of tlie Genus 

 Ennea. By Edgar A. Smith. 



[Received August 28, 1893.] 



Eknea (Ptychotrema) bassamensis. (Woodcut, fig. 1.) 



Testa elongata, impiformis, albida ; anfractus 8-9, convexiuscuK, 

 sutura profunda ixado obliqua sejuncti, coshdis confertis fili- 

 formihus ohlicjuis iiistructi, idtimus postice ad basin bi-scrohicu- 

 latus, ])rope labrum breviter ascendens ; aperhira alba, rotunde 

 quadrata, lonrjit. totius j adcequans, plicis et denticulis 

 incequalibus ringens, plica parietali valida lamelliformi intrante, 

 denticidis tribus colnmellaribus, unico basali minimo, liris 

 incequalibus quahior, lamella unica et denticulo intra labrum 

 munita ; peristoma leviter incrassatum, rejiexwn, album, nitens, 

 marr/inibus callo tenui junctis. 



Longit. 15 millim., diam. 5; apertura 4| longa, 3| lata. 



Nab. Abidjean, Grraud Bassam, West Africa. 



The first four whorls are rather more conyex than the rest, 

 almost smooth, and destitute of the fine oblique lirse which orna- 



Kg. 1. 



Ennea {Ptychotrema) hassamcnsis. 



ment the rest of the shell. The upper edge of these whorls has a 

 narrow pellucid margination and appears crenulated. The denti- 

 tion of the aperture is best explained by means of a figure (fig. 1 b). 



Ennea cyathostorna, Pfr., from Old Calabar, is closely aUied to this 

 species, but differs in its superior size and the dentition of the 

 apertiu'e. 



Fig. 1 c represents the young state of this species, in which 

 the armature of the aperture is quite diflPerent from that of the 

 adult form. 



