African Xon-ntarnie Molhisra. 495 



rnrrospoiuling to !i iJionomiced external crease, on the left of 

 tlio l):ist>. 



Long. 3-1, hit. 1-8; a|)ert., alt. 0-8, lat. O'C ; last wliorl 

 l*;") mm. 



JI(i/). Kknya, K cVume^a. (Percival). 



A rather ordinary littU^ specirs of tho stronj^^ly sculptured 

 group with conical apex, hut dilTering in its small round 

 aperture and dental process from any of its fellows. 



Gulella calva, sp. n. (PI. XIV. fig. 35.) 



Shell small, rimate, shuttle-shaped, thin, asperate, bleaehed 

 in the type, hut normally seniitransparent and pale olivaceous. 

 Spire proilueeil, tiie four apical whorls and the hase conical, 

 forming nearly equal triangles, intermediate whorls almost 

 parallel, ape.\ mamillate. Whorls 8, very convex, almost 

 equal in vertical measurement, the first 5 increasing rapidly 

 and rcnniinder equal in diameter; the first 3 smooth, 

 remainder covered with strong, regular, nearly straight, 

 vertical cost?e, further apart on the 5th and (3th whorls, 

 about 12 being visible from the front on the (Jili, and 1(5 on 

 the 7th ; suture simple, very deep. Aperture triangular, 

 rather narrowly rounded at base ; peristome expanded, 

 columella straight, slightly inclined to the left, rima long 

 and dee|) ; callus none; dentition consisting of a rather 

 deep-set, bluntly pointed colnmellar fold : a slightly incurved 

 lamella at the angle of paries and sinus ; a rather large, 

 triangular, pointed tooth on the outer lip, corresponding to 

 a single exterior depression and bearing an inconspicuous 

 cusp rather nearer the surface on its upper slope ; and a very 

 small, more deeply set denticle below the large tooth, on the 

 right extremity of the base. 



Long. 15, lat. S'l ; apert., alt. 1-2, lat. M; last whorl 

 I'D mm. 



J/ab. Kenya, Taru Desert {I'ercical). 



Gulella fi/ix, sp. n. (Vl. XIV. fig. 12.) 



Shell minute, ovate, rimate, asperate, jiale olivaceous. 

 Spire j)ro(luccd, sides slightly convex, apex bluntly rounded. 

 Whorls 7, cxtrenu'ly convex, the first 2, which form the 

 protoconch, smooth and rather disproportionately large, 

 remainder increasing very gradually in size, sculptured with 

 very strou}?, regular, rather curved, nearly vertical cost», 

 much closer on the 3rd than on the later whorls, there bcinir 



