SPECIES OF ZONITIDA FROM EQUATORIAL AFRICA, 801 
especially in the subsutural region, which latter appear to be in 
the texture of the shell and not at all in the nature of outward 
sculpture ; suture impressed ; base of shell slightly convex, rather 
more noticeably marked with the whitish textural lines than the 
rest of the shell; umbilicus moderately wide, deep; columella 
diffused upwards into a very thin, well-defined, and sinuous 
parietal callus, which reaches the upper margin of the labrum, 
curved and outwardly reflexed above, oblique and scarcely reflexed 
below; labrum simple; aperture oblique, compressedly subovate, 
Alt. 8°75, diam. maj. 13°75, diam. min. 11-25 mm. 
Aperture: alt. 5°5, diam. 5°75 mm. 
Hab. Larogi Hills, British Kast Africa. (A. Blayney Percival.) 
LAROGIELLA FONTICULA, sp.n. (PI. II. fig. 3.) 
Shell perforate, thin, roundly turbinate, fulvous; whorls 5, 
regularly increasing, sculptur ed with irregular, very oblique, 
radiate, transverse plications and microscopically shagreened ; 
suture impressed ; umbilicus narrow, deep, well-like, a little over- 
hung by the outward expansion of the columella margin ; 
columella margin vitreous, broadly outwardly expanded above, 
descending in a curve ; 3 labrum simple ; aperture roundly ovate. 
Alt. 6°75, diam. maj. 10, diam. min. 8 mm. 
Aperture: alt. 5, diam. 4-5 mm. 
Hab. Lake Mutanda, 8S.W. Uganda. (Robin Kemp.) 
LAROGIELLA KOMBAENSIS, sp.n. (PI. II. fig. 2.) 
Shell perforate, thin, submembranaceous, pale yellowish brown ; 
whorls 4, regularly increasing, sculptured throughout with regular, 
oblique, somewhat arcuate, transverse, crease-like plice; suture 
impressed; base of shell moderately inflated ; umbilicus rather 
wide, deep; columella vitreous, widely outwardly reflexed above, 
descending in a very slightly oblique curve; labrum thin, acute, 
projecting a little in front; aperture ovate. 
Alt. 4°75, diam. maj. 10, diam. min. 8 mm. 
Aperture: alt. 5°25, diam. 4 mm. 
Hab. Komba, 8.W. Uganda. (Robin Kemp.) 
LAROGIELLA MALASANJIENSIS, sp. n. (PI. I. fig. 23.) 
Shell somewhat depressedly turbinate, thin, pale brown; whorls 
5, regularly increasing, the last subangulate at the periphery, 
marked with oblique, arcuate, transverse plications; suture im- 
pressed; base of shell marked with very fine, wavy, revolving 
striz in.addition to the transverse sculpture ; umbilicus moderately 
wide, deep; columella descending in an oblique curve, outwardly 
expanded above; labrum thin, membranaceous; aperture broadly 
and compressedly sublunate. 
Alt. 5°25, diam. maj. 9°5, diam. min. 8°25 mm. 
Aperture: alt. 4°5, diam. 3°25 mm. 
Hab, Malasanji, 8.W. Uganda. (Robin Kemp.) 
