PSEUDOPEAS. 119 



separated by a deep and somewhat oblique suture, the last 

 whorl long, nearly half the total length. Aperture vertical, 

 oblong, acuminate above ; .peristome thin, simple and acute ; 

 columellar margin straight, a little reflexed and thickened. 

 Length 2.75, diam. 1.5, aperture 1.5 x 1 mm. (Jick.). ; 



Abyssinia: Bogu Valley, Bogos (Beccari). 



Subulina isseli JICK., Fauna der Land- und Siisswasser- 

 Mollusken Nord-Ost-Afrikas, in Nova Acta K. Leop-Carol. 

 Deutschen Akad. der Naturforscher, xxxvii, 1874, p. 138, pi. 

 5, f. 22. Beccaria isseli BGT., Malac. Abyss., in Ann. Sci. 

 Nat. xv, 1883, p. 119. 



Described from a single specimen thought by Jickeli to be 

 not full grown. 



8. P. PUSILLUM (Morelet). PI. 25, figs. 14, 15, 16. 



" Shell very small, rimate, turrited, rather thin, whitish 

 horn-color, shining, minutely costulate, apex somewhat obtuse. 

 Whorls 5^/2, plano-convex, joined by a moderately impressed 

 suture, a little terraced, the last nearly equal to one-third of 

 the entire length of the shell. Aperture oval; peristome 

 simple, acute, columellar margin descending vertically, 

 shortly reflexed as far as the base. Length 3, diam 1% mm." 

 (Morelet). 



Comoro Islands: Mayotte (Marie). 



Stenogyra pusilla MORELET, Journ. de Conch. July, 1881, 

 p. 220, pi. 10, f. 4. Not Achatina pusilla Pfr., nor Bulimulus 

 (Ena) pusilla Ad. 



"This shell, of which I have two fully adult specimens be- 

 fore me, is doubtless the smallest species of the genus. Its 

 minute size is sufficient, in the absence of all description, to 

 make it recognizable. The five whorls of which the spire is 

 composed are plainly separated and even a little turriculate ; 

 the first two are smooth, the remaining finely costulate. The 

 columella is straight but truncate." (Morelet). 



Figured from specimens received from Marie. The con- 

 spicuously ribbed surface and diminutive size distinguish it 

 from other species of the Comoros. The protoconch has 

 sparse, almost subobsolete spiral striae. 



