2 20 — 



apical whorls, more polished upper surface and much less marked transverse 

 stiiae, and in the coarser and more distant spiral striae. 

 Alt. 1.5, diam. maj. (nearly) 2.25 mm. 



Hab. — Naivasha, British East Africa. 



Pseudoglessula pusilla sp. n. — PI. XI, fig. 6. 



Shell small, ovate, thin, glassy, pale greenish white ; whorls 4, shining, 

 smooth but for Unes of growth, the last obtusely angled at the peripher}^; 

 suture impressed; columella arched above, curved, obliqueh^ truncate 

 below; labrum simple, acute; aperture nearh' quadrate. 



Alt. 2, diam. 1.25 mm. 



Hab. — Xaivasha, British East Africa. 



Xotvrithstanding the immature appearence of the shells before 

 me, I am con-\-inced, after an examination of a good séries of 

 spécimens, that thev are in an adult state. 



5^ 



Subulina virgo sp. n. — PL XI. fig. 7. 



Shell small, subulately cylindrical with obtuse apex, thin, iridescent, 

 white; whorls 5, pohshed, flattish, the last very long; suture impressed; 

 columella descending in a curve, callously thickened, "white, abruptly tiim- 

 cate below and dififused into a well defined callus which reaches the margin 

 of the labrum above; labrum simple; aperture elongately, inversely auri- 

 form. 



Alt. 2.5, diam. maj. 0.5 mm. 



Aperture : ait. 0.75, diam. (about) 0.18 mm. 



Hab. — Xaivasha, British East Africa. 



Subulina tribulationis sp. n. — PL XI, fig. 2. 



Shell differing from 5. virgo in its rather larger size, much larger apical 

 whorls and in having one whorl less; the colour is yellowish, the columella 

 is less curved, not so callously tliickened and less abruptly truncate, while 

 the aperture is shorter and much broader in proportion to the size of 

 the shell. 



Alt. 0.3, diam. maj. 0.75 mm. 



Apertrure : ait. 0.5, diam. 0.25 mm. 



Hab. — Xaivasha, British East Africa. 



