168 PSEUDOGLESSULA. 



' ' The two forms of Pseudoglessula here described, together 

 with P. kirki Craven and P. leroyi Bourguignat, form a little 

 group of species which are all closely related, having the 

 same character of sculpture, form of aperture and columella, 

 and differing principally in their general form and tone of 

 coloration. A feature common to all is a faint carination 

 around the middle of the body- whorl, and a more glossy sur- 

 face below it. P. gracilior is the most slender of all the 

 forms, and P. prestoni the broadest. P. leroyi has nine 

 whorls, P. gracilior and P. kirki eight, and P. prestoni only 

 seven. With the exception of P. kirki, which is often banded, 

 all the species are of an uniform tint, varying from light 

 brown to a dark olive-brown. P. subcarinifera, Smith, is a 

 diminutive form belonging to the same group." (Smith). 



16. P. LEROYI (Bourguignat). PI. 61, fig. 89. 



Shell lengthened, moderately swollen, rather thin, sub- 

 pellucid, glossy, uniform red- chestnut or somewhat wine- 

 colored (or in some specimens the color is a pale olivaceous 

 yellow tint), paler at the base of the columella. Elegantly 

 lamellate, the lamellae regular, close, stronger and more 

 spaced at the summit, more delicate on the lower part; and 

 encircled at the periphery with a more glossy, obsoletely sub- 

 nodulose spiral sulcus. Spire long, acuminate, but rather 

 obtuse at the summit. Whorls 9, convex, regularly and slowly 

 increasing, separated by the well-impressed suture; the last 

 whorl over one-third the length, oblong-convex, more glossy 

 and less costulate below, elegantly lamellose above, unisulcate 

 at the periphery, sulcus thread-like, slightly projecting, 

 glossy, nearly smooth, but nevertheless subnodulose under a 

 lens, and extending to the aperture. Aperture suboblique, 

 long-oblong, narrow, angular above and below, regularly con- 

 vex outwardly, wine-colored within. Peristome unexpanded, 

 acute. Columellar margin paler, somewhat amber- colored, 

 straight, obliquely truncate at the base. Parietal callous thin 

 and diaphanous. Length 40, diam. 16 mm. ; aperture 16 mm. 

 long, 7 wide (Bgt.). 



East Africa: Nguru Mts., between Ukamba and Ussagora, 



