798 MR. H. B. PRESTON ON NEW GENERA AND 
colour; whorls 5, regularly increasing, the last large, marked 
with obsolete, oblique, transverse, crease-like plications which are 
more developed in the subsutural region ; suture impressed ; base 
of shell somewhat inflated; umbilicus rather narrow, deep, 
partly overhung by the outward expansion of the columella; 
columella very slightly curved, scarcely oblique; labrum simple, 
membranaceous, projecting a little in front ; aperture ovate. 
Alt. 7:5, diam. maj. 10°75, diam. min. 8°25 mm. 
Aperture: alt. 6°25, diam. 4°5 mm. 
Hab. Burunga, Mount Mikeno, Belgian Congo, at an altitude 
of 6000 feet. (Robin Kemp.) 
BuRUNGAELLA BUHAMBAENSIS, sp. n. (PI. I. fig. 16.) 
Shell perforate, thin, corneous, turbinate, pale yellowish brown; 
whorls 5, the first small, the second somewhat large in proportion, 
the remainder regularly increasing, slightly convex, irregularly 
and obsoletely plicate and sculptured with wavy, transverse strie, 
the last whorl angled at the periphery; suture impressed, very 
narrowly margined below ; umbilicus very narrow, deep, almost 
covered by the upper, broad, outward expansion of the columella 
margin; columella margin membranaceous, broadly, triangularly, 
outwardly expanded and nearly vertically descending above, 
then angled and very obliquely descending below; aperture 
broadly and rather compressedly obliquely subcrescentie. 
Alt. 5°5, diam. maj. 7, diam. min. 6 mm. 
Aperture: alt. 4, diam. 3 mm. 
Hab. Buhamba, near Lake Kivu, Belgian Congo. (Robin 
Kemp.) 
BURUNGAELLA IMPERFORATA, Sp. n. (PI. I. fig..15.) 
Shell imperforate, turbinate, very thin, yellowish brown; whorls 
5, regularly increasing, the last somewhat inflated, the last two 
microscopically spirally striate and marked with oblique, trans- 
verse, crease-like plicee ; suture impressed ; base of shell inflated ; 
columella obliquely descending, outwardly, callously expanded 
above; aperture depressedly and very broadly sublunate. 
Alt. 6°25, diam. maj. 9°25, diam. min. 7°75 mm. 
Aperture: alt. 4°75, diam. 4°25 mm. 
Hab. Burunga, Mount Mikeno, Belgian Congo, at an altitude 
of 6000 feet. (Robin Kemp.) 
BURUNGAELLA MUTANDANA, sp.n. (PI. I. fig. 14.) 
Shell rather depressedly turbinate, thin, pale yellowish brown; 
whorls 43, regularly increasing, the last subangulate at the 
periphery, marked with oblique transverse riblets or creases, which 
become obsolete on the base; suture impressed, crenellated by 
the terminations of the transverse riblets; umbilicus moderately 
narrow, deep; columella rather broadly outwardly expanded 
