808 ME. H. B. PRESTON ON NEW GENERA AND 
oblique, slightly arcuate, transverse costule ; suture impressed, 
narrowly callously margined above; base of shell moderately 
convex, somewhat polished, marked with lines of growth and 
sculptared with fine, wavy, revolving strie; umbilicus narrow, 
deep; columella descending in an oblique curve, outwardly ex- 
panded above and diffused into a very thin, almost imperceptible, 
well-defined, parietal callus, which reaches the upper margin of 
the labrum; labrum simple, acute; aperture obliquely, com- 
pressedly sublunate. 
Alt, 9, diam. maj. 14, diam. min. 12°25 mm. 
Aperture: alt. 5°75, diam. 6°25 mm. 
Hab. Jinga on Lake Victoria Nyanza, 5.W. Uganda; also 
taken at Entebbe and Kampala in the same district. (Robin 
Kemp.) 
LEDOULXIA LEVISTRIATA (Preston*), var. NYERIENSIS, var. 0. 
(Bi ne: 3.) 
Shell differing from the typical form in its rather broader 
shape and proportionately slightly less acuminate spire, and in 
the colour, which in the present variety is of a yellowish hue. 
Alt. 12, diam. maj. 19°75, diam, min. 17 mm. 
Aperture: alt. 8°5, diam. 9°5 mm. 
Hab. Nyeri, British East Africa, (Robin Kemp.) 
LEDOULXIA ADJACENS, sp.n. (PI. I. fig. 8.) 
Shell differing from Z. levistriata (Preston) in its more depressed 
form, rather narrower perforation, and slightly broader aperture ; 
the transverse sculpture on the whorls is finer and the spiral 
sculpture on the base rather coarser and considerably more 
distant ; the colour of the present species is yellowish brown, and 
the carina and sutural margination not so marked as in JZ, levi- 
striata. 
Alt. 11°5, diam, maj. 18, diam. min. 15°5 mm. 
Aperture: alt. 8, diam. 8°25 mm. 
Hab. Mount Kenangop, Aberdare Range, British East Africa. 
(Robin Kemp.) 
LEDOULXIA MARSABITENSIS, sp. n. (PI. I. fig. 5.) 
Shell allied to Martensia permanens Smithy, but smaller, 
darker in colour, more narrowly umbilicate, more closely and 
coarsely sculptured, and with proportionately higher spire than 
has that species. 
Alt. 9°75, diam. maj. 15, diam. min. 13°5 mm. 
Aperture: alt. 7, diam. 6°25 mm. 
Hab. Northern slopes of Mount Marsabit, British East Africa. 
(A. Blayney Percival.) 
x * Martensia levistriata Preston, Rev. Zool. Africaine, Bruxelles, iii. p. 48, pl. v. 
g. 2. 
“+ J. Malac. viii. p. 94. 
