170 PSEUDOGLESSULA. 



shining, thin, greenish-corneous. Apex turned downwards; 

 whorls 7, the first two or three rather strongly costulate, the 

 rest rather convex, obliquely striate, the last whorl encircled 

 with an obsolete keel around the middle. Aperture ovate, 

 slightly exceeding one- third the total length; peristome thin, 

 the columellar margin rather widely dilated, reflexed over 

 the umbilical crevice, and towards the base obliquely subtrun- 

 cate or plicate within. Length 16, diam. 7 mm., aperture 6 

 mm. long, 4 wide (Smith). 



East Africa: Mamboya, at an elevation of 4000 to 5000 

 ft. (Last). 



Bulimus (Cerastus f) introversus SMITH Ann. and Mag. 

 N. H. (6), vi, p. 155, pi. 5, f. 11. Pseudoglessula introversa 

 MARTENS, Beschalte Weichthiere p. 116. 



* ' The resemblance in form and the faint raised line around 

 the body- whorl recall to mind the typical form of Subulina 

 subcarinifera. That species is imperforate, much more 

 coarsely sculptured and has a more distinctly truncate colu- 

 mella. The apex in both forms is similarly introverted ' ' 

 (Smith). 



19. P. CONRADTI Martens. PI. 61, fig. 99. 



Shell rimate, somewhat turrited, with close weak rib-strise ; 

 horn-brown; 7 whorls, the riblets stronger and more spaced 

 on the vecond; the following whorls increase regularly in 

 width and are weakly convex. Last whorl elliptical, with a 

 scarcely noticeable keel in the middle, rounded below. Aper- 

 ture but slightly oblique, obliquely trapezoidal, with unex- 

 panded somewhat thick peristome. Outer lip weakly arcu- 

 ate; lower margin nearly horizontal. Columellar margin 

 nearly vertical, moderately expanded and reflexed, not cov- 

 ering the umbilical chink, very weakly obliquely truncate at 

 the base. Length 14, diam. 6 mm., the aperture 5.33 mm. 

 long, with the peristome 4 wide, without it 3 mm. (Marts.). 



East Africa: Ussambara (Conradt). 



Pseudoglessula conradti MARTS., Nachrbl. D. M. Ges. 1895, 

 p. 184 ; Beschalte Weichthiere p. 116, pi. 5, f . 13. 



This peculiar speeies stands intermediate between Pseu- 



