British and German East Africa, &c. 527 



Ennea quadrilateralis, sp. n. (Fig. 2.) 



Shell rather large, rectangularly ovate, perforate, som.3- 

 what thin, pale yellowish ; whorls 6, sculptured with mode- 

 rately fine, very closely set, arcuate, transverse strise ; sutures 

 impressed, crenellated below by the termination of the trans- 

 verse strise; umbilicus narrow, partly concealed by the reflec- 

 tion ot the columella ; columella white, descending in a 

 gentle curve and extending upwards and outwards into a thin 

 callus, which reaches the lip above; labrum white, reflexed 

 and terminating in a sinus, which forms with the parietal 

 wall a triangular notch ; aperture almost square, edentulate ; 

 interior of shell white. 



Alt. 20*5, diam. maj. 17*5 mm. 



Aperture: alt. 10, diam. 9'5 mm. 



Hab. Shimbi Hills, British East Africa. 



Ennea givendolince, sp. n. (Fig. 3.) 



Shell scarcely rimate, cylindrical, yellowish white, smooth, 

 polished ; whorls 6|, moderately convex ; sutures impressed, 

 narrowly margined above ; columella extending above into 

 a thin, white, well-defined callus ; labrum white, sinuous 

 above, rather broadly expanded, thickened, and reflexed ; 

 aperture irregularly subr octangular, bearing a slightly curved 

 or twisted parietal lamella on the right, a large, broadly bifid 

 lamella on the outer lip, and a small denticle inside the basal 

 lip, while the columella is internally developed into a broad 

 shelf-like projection, ending in a thick, oblique, C-shaped 

 lamella at its base. 



Alt. 5, diam. maj. 1*5 mm. 



Aperture : alt. 1, diam. # 5 mm. 



Hab. Shimbi Hills, British East Africa. 



Separable from E. subjiavescens, Smith, from Mamboia, 

 German East Africa, by its much narrower and smaller form ; 

 it lacks the small upper lamella on the outer lip, the upper 

 basal denticle, and has only the oblique C-shaped lamella on 

 the columella, instead of the three columellar lamellae of that 

 species. 



Ennea marionce, sp. n. (Fig. 4.) 



Shell pupiform, transparent, vitreous, white, smooth, 

 polished ; whorls 6, the last finely puckered behind the 

 labium ; sutures impressed, narrowly margined above ; colu- 

 mella broadened above, narrowing obliquely below ; labrum 

 sinuous, opaque, white, rather broadly expanded, and re- 

 flexed ; aperture irregularly rectangular, bearing a rather 



