African yon-niarine MolJuKca. 347 



Pseudoglessula mutandana, sp. n. 

 (PI. I. fio-. 23 ; text-tig. 2, p. 346.) 



Shell of fair size, turriforni, imperforate, thin^ asperate, 

 semitransparent, corneous yellow-brown with an occasional 

 dark red streak. Spire produced, sides sligl.itly convex, 

 extremity of apex minutely involute. Whorls 8, fairly 

 convex, regularly increasing, subcarinate round the base, 

 sculptured to the aj-ex with regular, nearly straight and 

 vertical, transverse costulae, which are close together on the 

 firstj much further a})art on the 2nd, and close again on 

 the 3rd whorl, after which they increase gradually in dis- 

 tance, there being 8 in the space of 2 mm. on the face of 

 the last whorl, which is rather smoother on its base ; the 

 intervals between the costul?e are filled with a few faint 

 irregular transverse striae and a general appearance of 

 corrugation, rather than spiral sculpture ; suture simple, 

 well-defined. Aperture subrhombic, peristome simple, acute, 

 columella rather pale, straight, erect, sharply truncate at 

 extreme base ; paries white. 



Long. 10- 1, lat. 3'2 ; apert., alt. 2 5, lat. \'7 ; last whorl 

 4' 5 mm. 



Hab. Uganda, Lake Mutanda (^Kemp). 



Possibly only a local race of Fs. cruda^ Pilsbry, from 

 which, however, Dr. Pilsbry informs me that it diffeis in its 

 ribs being nearly twice as far apart as in his species. 



Pseudoglessula per obtusa, sp. n. (PI. L fig. 8.) 



Shell rather large, elongate-turriform, imperforate, thin, 

 silky, transparent, pale olivaceous. Spire produced, sides 

 regular, apex rounded. Whorls 9, moderately convex, 

 regularly increasing, faintly bluntly carinate toAvards the base, 

 sculptured practically to the apex with close, regular, 

 prominent, nearly straight and vertical transverse stride, 

 which are slightly closer together on the first and become 

 almost obsolete on the base of the last whorl; suture simple, 

 well-defined. Aperture subovate, peristome simple, acute; 

 outer lip straight in profile, receding a little to the base ; 

 columella short, erect, strongly truncate at base. 



Long. 22-1, lat. 5*4 ; apert., alt. 5'0, lat. 2' 5 ; last Avhorl 

 9-0 mm. 



Hab. Belgian Congo, Burunga, Mt. Mikeno, 6000 ft. 

 [Kemp) . 



A rather ordinary yellowish shell w ith somewhat unusually 

 obtuse apex, not particularlv resembling anv species known 



23^ 



