CURVELLA, EAST AFRICA. 55 



form, more than half the total length of the shell; lip thin, 

 prominent in the middle, curved, incised or sinuate at the 

 suture. Columella slightly oblique, expanded and reflexed, 

 slightly twisted. Length 13, diam. 6.5, aperture 6% mm. 

 long, 3 wide (Smith}. 



Mamboia, 4,000 to 5,000 ft. elevation (Last); Butumbi; 

 west side of Runssoro, 1,175 meters, on the Itiri river, etc. 

 (Stuhlmann). 



Bulimus (Hapalus) disparilis SMITH, Ann. Mag. N. H. (6), 

 vi, p. 156, pi. 5, f. 13 (Aug., 1890). Hapalus d., MARTENS, 

 Beschalte Weichthiere, p. 128, with fig. of genitalia; pi. 1, 

 f. 12, shell. 



"In the single specimen from the above locality the striae 

 upon the upper whorls are strongly marked near the suture 

 above, and become weaker towards the lower part. On the 

 last volution, however, the striae are equally strongly incised 

 all over the surface, being especially distinct near the outer 

 lip. There is a. slight depression below the suture in this 

 whorl, but it may only be an individual peculiarity. 



In three specimens collected by Sir J. Kirk in Usagara, 

 which are smaller than the type, the strias are still stronger 

 and continue from suture to suture. They also differ in hav- 

 ing the whorls slightly more convex and in being imperfor- 

 ate; but this may be due to the immaturity. Notwithstand- 

 ing these differences, on placing them side by side they all 

 appear to belong to the same species" (Smith). 



Dr. Stuhlmann noted that the soft parts are pale citron- 

 yellow, the tentacles light reddish. Length of the foot 10 

 mm. It always contained eggs. The columella of the shell, 

 in those collected by Dr. Stuhlmann, was always more or less 

 twisted, and they are a little more slender than Smith's type; 

 but in all other respects they agree well. The impressed, 

 arcuate striae are especially well developed in this species. 

 The genitalia, from a drawing by Schako, are figured, f . 16. 



15. C. KRETSCHMERI (Martens). PI. 8, fig. 17. 



Shell long-lanceolate, with the umbilicus not very narrow, 

 with weak striae somewhat bent back below the suture ; whit- 



