212 MR. H. B. PKESTON ON AGNATHOUS 



Var. MAJUSCULA, var, n, (PI. XXXV. figs. 2, 2 a.) 



Shell much larger than either the typical form or the var. 

 obesa ; it is also more cylindrical than the latter, though the 

 dentition agrees perfectly with that variety. 



Alt. 13"75, cliam. maj. 6'5 mm. 



Aperture : alt. 3'75, diam. 3 mm. 



Hah. Mt. Kenangop, Aberdare Range, British East Africa 

 (^Rohin Ke'm'p). 



The typical series from Mt. Kenia was collected in a dead 

 condition and appeared, though polished and shiniug, to be pure 

 white ; both the present varieties were collected alive and are of 

 an olive-greenish hue, which is also doubtless the normal colour 

 of the typical form. 



Ennea papyracea, sp. n. (PI. XXXY. figs. 4, 4 «.) 



Shell ovately cylindrical, white, vei-y thin ; whorls 8, not very 

 convex, the first seven regulai'ly increasing, the eighth narrower, 

 sculptured with rather coarse, very oblique, transverse riblets, 

 and, on the last whorl, with fine, rather indistinct, spiral strias ; 

 suture very lightly impressed, sti'ongly crenellated by the 

 termination of the transverse riblets ; umbilical area presenting 

 the appearance of a very shallow, elongate fissure ; columella 

 somewhat vertically descending, extending above into a thin, 

 parietal callus ; labrum white, narrowly reflexed ; aperture sub- 

 quadrate, armed with a parietal lamella, a small denticle, and 

 below this a large erectly squarish denticle just within the outer 

 lip, a small basal denticle and a broad projection on the columella 

 terminating in three denticles. 



Alt. 11-75, diam. maj. 6 mm. 



Aperture: alt. 3-5, diam. 2-25 mm. 



Hah. Kear Lake Kivu, Belgian Congo [Robin Kemp). 



Ennea pebgrata, sp. n. (PI. XXXV. figs. 6, 6 a.) 



Shell rimate, rather large, elongately cylindrical, semitrans- 

 parent, whitish, shining ; whorls 8, not very convex, the first 

 four regularly increasing, the remainder slowly increasing in 

 length but not in breadth, sculptured with irregular, very 

 oblique, transverse plicae, which are more noticeable in the 

 sutural region ; suture impressed, coarsely crenellate below by 

 the terminations of the transverse plicae ; umbilicus moderately 

 nai-row ; labrum white, shining, reflexed and outwardly ex- 

 panded, especially below ; columella vertically descending, widely 

 reflexed above, narrowing below, bearing a coarse, projecting 

 denticle in the median region ; aperture subquadrate, armed 

 with a coarse, erect, vertical, parietal plait, two denticles on the 

 inner surface of the outer lip, of which the uppermost is the 

 smaller, and a broad denticle at the base. 



Alt. 12*5, diam. maj. 4*25 mm. 



Aperture: alt. 3'5, diam. 1'5 mm. 



