788 MR. H. B. PRESTON ON NEW GENERA AND 
AFRICARION CoPIosA, sp.n. (PI. II. fig. 13.) 
Shell subelliptical, solidly corneous, brownish olive; whorls 3, 
rapidly increasing, the Jast very large, marked with transverse, 
radiate growth-plice and irregular, distant, scvatch-like, spiral 
sulcations; suture impressed ; base of shell moderately convex ; 
columella margin arched above, angled and obliquely descending 
below; labrum simple, considerably projecting in front, receding 
above and below ; aperture ovate. 
Alt. 9°75, diam. maj. 17, diam. min. 12°5 mm. 
Aperture: alt. 9, diam. 10°5 mm. 
Hab. Burunga, Mount Mikeno, Belgian Congo, at an altitude 
of 6000 feet. (Robin Kemp.) 
AFRICARION KIDUHAENSIS, sp. n. (PI. II, fig. 16.) 
Shell differing from 4. copiosa Preston in its more globular 
form, membranaceous texture, slightly paler colour, more obliquely 
descending columella margin and more circular aperture. 
Alt. 9, diam. maj. 14°75, diam. min. 11 mm, 
Aperture: alt. 8°25, diam. 9 mm. 
Hab. Kiduha, Lake Mutanda, 8.W. Uganda. (Robin Kemp.) 
AFRICARION MARSABITENSIS, sp. n. (PI. II. fig. 14.) 
Shell ovate, much inflated, thin, pale reddish brown ; whorls 3, 
the last two rapidly increasing, the earlier whorls marked with 
punctate spiral striz, the last with arcuate transverse growth- 
lines only; suture very lightly impressed, narrowly margined 
below; base of shell inflated; columella margin obliquely 
descending, broadly curving below; labrum simple, acute ; 
aperture roundly ovate. 
Alt. 12°75, diam. maj. 15°75, diam. min. 12 mm. 
Aperture: alt. 10°75, diam. 9°5 mm. 
Hab. Northern slopes of Mount Marsabit, British East Africa, 
at an altitude of 4600 feet. (A. Blayney Percival.) 
AFRICARION ORESTIAS, sp. n. (Pl. II. fig. 15.) 
Shell rather small, ovate, very thin, almost membranaceous, 
pale yellowish brown, polished, shining; whorls 3, rapidly 
increasing, the last very large, moderately convex, projecting in 
front; suture almost linear, narrowly margined below; columella 
margin descending in a rounded curve; aperture wide, very 
large, dilated, roundly ovate; labrum membranaceous, receding 
above and below. 
Alt. 6, diam. maj. 9°5, diam. min. 7:25 (nearly) mm. 
Aperture: alt. 5°5, diam. 5°75 mm. 
Hab. Slopes of Mount Kenia, British East Africa. (Robin 
Kemp.) 
AFRICARION OSCITANS, sp.n. (PI. II. fig. 4.) 
Shell thin, pale amber-colour, semiovate, depressed, the spire 
very slightly exserted ; whorls 3, rapidly increasing, the first two 
