DESCRIPTIONS 



or 



NAIVASHA, BRITISH EAST AFRICA 



H. B. PRESTON, F. Z. S. 



(With P)ate XI). 



Ennea Iredalei sp. n. — PL XI, fig. 5. 



Shell rimate, small, shortly cylindrical, thin, yellowish white; whorls 6, 

 the last ascending in front, marked with faint, very oblique, transverse 

 striae; sutures deeplyimpressed; perforation very narrovr; columella des- 

 cending obliquely; labrum white, dilated, slightly reflexed; aperture sub- 

 quadrate, armed with a very interiorly situate, oblique lamella and a 

 revolving columella plait also situated very interiorly. 



Alt. 2.75, diam. maj. 1,25 mm. 



Hab. — ■ Naivasha, British East Africa. 



Ennea lacuna sp. n. — PI. XI, fig. 8. 



Shell globosely turbinate, yellowish white; whorls 7, convex, the fîrst 

 five increasing, the last two decreasing, the body whorl ascending in front, 

 the apical whorls smooth, the remainder closely, transversely ribbed; suture 



