802 MR. H. B. PRESTON ON NEW GENERA AND 
NAKURUELLA, gen. nov. 
Shell umbilicate, turbinate, thin, corneous, transversely plicate, 
with broad aperture. 
Genotype: Zingis bullata Preston *. 
NaAkURUELLA soror, sp.n. (PI. I. figs. 13a, 136, 13¢.) 
Shell differing from WV. bullata Preston in its more depressed 
form, in having : a whorl less, in its still narrower umbilicus, and 
sisiilive more oblique and much broader a perture; the basal 
portion of the labrum is also slightly reflexed. 
Alt. 11, diam. maj. 17, diam. min. 13 mm. 
Aperture: alt. 8°5, diam. 8°75 mm. 
Hab. Burunga, Mount Mikeno, Belgian Congo, at an altitude 
of 6000 feet. (Robin Kemp.) 
MIKENOBLLA, gen. nov. 
Shell thin, corneous, narrowly perforate, with somewhat elevated 
spire, transversely plicate only, labrum acute. 
Genotype: J. ahena Preston. 
Species which should probably be referred to this genus are :— 
Zingis gregorii Smith, from Mt. Kenia, Proc. Malac. Soe. 
Lond. vol. i. p. 164. 
Zingis aurea Preston, from British East Africa, Rev. Zool. 
Africaine, Bruxelles, vol. iii. p. 47, pl. v. fig. 6. 
MIKENOELLA AHENA, sp. n. (PI. II. figs. 26 a, 265, 26.) 
Shell perforate, conically turbinate, very thin, pale yellowish 
brown; whorls 5, regularly increasing, the last large, obsoletely 
transversely plicate, the plicee being more noticeable in the sub- 
sutural region ; suture impressed, very narrowly margined below ; 
base of shell inflated ; utubilicus narrow, deep, partly concealed 
by the outward reflexion of the columella margin; columella 
margin broadly and membranaceously outwardly reflexed above, 
almost vertically descending in a gentle curve; labrum acute ; 
aperture ovate. 
Alt. 11-25, diam. maj. 13, diamn. min. 11 mm. 
Aperture: alt. 7°25, diam. 5 mm. 
Hab. Burunga, Mount Mikeno, Belgian Congo, at an altitude of 
6000 feet. (Robin Kemp.) 
MIKENOSLLA ELEVATA, sp.n. (PI. IJ. fig. 25.) 
Shell perforate, inflatedly turbinate, thin, yellowish brown, 
painted just above the suture and periphery with a broad spiral 
band of purplish red, below which occurs a peripheral narrow 
band of a creamy colour; whorls 53, regularly increasing, the last 
inflated, marked only, especially on the upper whorls, with fine 
oblique growth-plice; suture impressed; base of shell inflated, 
# Rey. Zool. Africaine, Bruxelles, yol. ui. pp. 47-48, pl. v. fig. 4. 
