TRUNCATELUNA OP CENTRAL AFRICA. 89 



21. TRUNCATELLINA BLANFORDI (Jickeli). PL 9, figs. 10 to 13. 

 The minute shell is perforate, cylindric, somewhat con- 

 tracted towards the base, brown, with an oily luster, and 

 covered with close, somewhat oblique, longitudinal riblets, 

 which are seen only under a lens, as in the two preceding 

 species. The 6 convex whorls increase regularly and are 

 separated by a rather deep suture ; last whorl rises a little to 

 the aperture in front and is lightly compressed at base. The 

 aperture is scarcely oblique, ovate. Rather deep within there 

 is a small, pointed denticle. The columella is lightly bowed ; 

 in the middle a hardly noticeable swelling, which may be re- 

 garded as the beginning of a tooth, is perceptible. The palate 

 is entirely unarmed. The peristome is whitish, slightly thick- 

 ened and reflected ; the margins converge. Length 1%, diam. 

 %, aperture alt. %, width % mm. (Jickeli) . 



Abyssinia: Habab, in the gorge of Asqaq, on Nakfa, 5664 

 ft., on rotten wood; also on the descent of Nakfa at the vil- 

 lage Sykk (Jickeli) 7 specimens. 



Pupa blanfordi JICKELI, Nova Acta, vol. 37, 1875, p. 127, 

 pi. 5, f. 17. 



In shape and striation it agrees with P. scKttleri, in the 

 umbilicus with P. lardea; otherwise it differs from both of 

 these as well as from P. str obeli, claustralis and salonensis by 

 the absence of palatal and columellar folds (Jickeli) . 



V. CENTRAL AFRICAN SPECIES. 



Certain species supposed by Mr. Preston to belong to Ennea 

 appear to be Truncatellinse, so far as one can judge from the 

 figures and poor descriptions. I have not seen the shells. 



22. TRUNCATELLINA NAIVASHAENSIS (Preston). PL 9, fig. 21. 

 Shell minute, cylindrical, yellowish-white; whorls 7, the 



first 3 rapidly increasing; the last elongately strangulate be- 

 hind the outer lip, sculptured with oblique, moderately dis- 

 tant riblets; suture impressed; columella vertically descend- 

 ing, outwardly expanded over the umbilical area; labrum 

 slightly reflexed especially below; aperture somewhat irreg- 

 ularly triangular, edentulate. Alt. nearly 2, diam. 0.75 mm. 

 (Preston). 



