132 ABYSSINIAN HOMORUS. 



scarcely increasing, forming a somewhat cylindric summit, 

 and giving the upper part of the spire an attenuated appear- 

 ance. The chestnut-brown streaks begin on the fifth whorl. 



2. H. RAGAZZII Pollonera. PI. 58, fig. 51. 



Shell imperforate, turrited-subulate, closely and irregularly 

 longitudinally striate, fragile, lucid. Spire pale corneous; 

 last whorl corneous, sparsely marked with brown longitudinal 

 streaks. Whorls 8, a little convex, the last nearly one-half the 

 total length. Aperture piriform, acutely angular above; 

 cohimella arcuate, suboblique and shortly truncate; outer lip 

 straight, acute. Length 16.5, diam. 5.5 mm. (Poll.). 



Northeast Africa: Eutoto, Ilavash Valley, Abyssinia, a 

 single specimen under a stone (Dr. Ragazzi). 



Homorus ragazzii POLL., Bull. Soc. Malac. Ital. xiii, 1888, 

 p. 74, pi. 3, f. 10 (shell), 16 (teeth). 



Differs from H. cyanostoma by its much smaller size, rela- 

 tively less lengthened and less acute spire, and fewer dark 

 si ; ipes, which are restricted to the last whorl. 



Group of H. darnaudi. 



Pale, glossy corneous or greenish-yellow shells without 

 brown streaks; the surface usually distinctly striate, early 

 whorls smooth. 



These forms might as well have been left in Subulina, from 

 which they differ chiefly in being larger; but it is not easy 

 to draw a line between them and still larger, opaque, brown- 

 streaked forms, which are not likely to belong to Subulina. 



3. H. VERNICOSUS (Jickeli). PI. 58, figs. 43, 44. 



Shell imperforate, subulate, thin, longitudinally irregularly 

 striate, decussated with very fine spiral lines at the base of 

 the last whorl, with a varnish-like gloss; uniform greenish- 

 yellow. Spire long, the apex rather obtuse, papillate ; whorls 

 12, a little convex, separated by a rather deep, oblique suture, 

 the last whorl descending, one-third the total length. Aper- 

 ture oblique, piriform, acutely angular above, dilated basally. 

 <!olumella arcuate, obliquely truncate; peristome simple, thin, 



