r>OG My. ^^. Connolly on 



Long. 97, lat. 2-8; apert., alt. 2 2, lat. 1-2; last wliorl 

 3-8 mm. 



Hab. Uganda, Mt. Elgon {Woodhouse). 



Tlie distinguisliiug feature of this species is the sliarp 

 forward angulation of the outer lip, iu contrast with the 

 almost straight striation ; this ap])ears to be constant even 

 in immature specimens, and, together with the more rapid 

 increase in length of whorl, separates sinuilabiata from its 

 nearest ally, S. validior. 



The protoconch, as shaken out of an adult shell, contains 

 2i whorls and is practically smooth until just before the 

 outer lip, where there arc 2 or 3 extremely faint transverse 

 strise. 



It will be observed that the 7 foregoing species are all 

 thickly callused and sliovv a slight, but clear, peristomatal 

 reflexion, while in at least one instance there is indication 

 of parietal dentition ; they may all be accepted as mature, 

 fully formed exam})les of the highest development that tlieir 

 particular group is capable of attaining. Of the 10 species 

 which follow, none have a reflexed peristome or any sign of 

 dentition and very {ew show any trace of callus ; whether 

 they are actually mature, or would in course of time have 

 developed any of these features, cannot yet be determined. 



Streptostele elgonensis, sp. n. (PL XIV. fig. 9.) 



Shell small, acicular, subrimate, thin, silky, transparent, 

 lacteous. Spire produced, sides nearly regular, apex acute. 

 Whorls 9, slightly convex, gradually increasing, the first 

 smooth, second extremely faintly, closely transversely striate, 

 remainder sculptured with well-defined, rather close, regular, 

 straight, Axrtical rib-striae, fainter on the base of the last 

 whorl ; suture moderately oblique, subcrenulate, well 

 defined. Aperture subrhomboid, peristome simple, outer lip 

 hardly curved outward, advancing very slightly in profile 

 and then receding a little to the base ; columella straight 

 and erect, margin moderately thickened, producing a small 

 rimation ; callus faint ; dentition none. 



Long. 8*6, lat. 21; apert., alt. 1*7, lat. TO ; last whorl 

 3 mm. 



Hab. Uganda, Mt. Elgon [Woodhouse). 



Streptostele hasta, sp, n. (PI. XIV. fig. 16.) 



Shell of fair size, lanceolate, rimate, thin, smooth, glossy, 

 transj)arent, pale olivaceous-vitreous. Spire much produced, 

 sides straight, apex acute. Whorls 10, nearly flat, regularly 



