794 MR. H. B. PRESTON ON NEW GENERA AND 
GUDEBLLA MULTISTRIATA, sp. n. (Pl. III. fig. 3.) 
Shell small, thin, depressed, suborbicular, pale yellowish horn- 
colour; whorls 4, sculptured throughout with fine, very closely- 
set, spiral striae, the last large ; suture lightly impressed, margined 
below ; perforation nearly concealed by the rather broad outward 
expansion of the columella margin; columella margin obliquely 
descending; labrum simple, acute; aperture broadly obliquely 
sublunate. 
Alt. 2°75, diam. maj. 5°75, diam. min. 5 mm. 
Aperture: alt. 2°5, diam. 2°75 mm. 
Hab. Buhamba, near Lake Kivu, Belgian Congo, (Robin 
Kemp.) 
Allied to Thapsia insimulans Smith * from the Nyika Plateau, 
British Central Africa, but larger, with broader whorls and 
coarser spiral sculpture. 
JUDEELLA MUKANDANSIS, sp. n. (PI. ITI. fig. 11.) 
Shell differing from G. kigeziensis Preston T in its larger size, 
much paler colour, more exserted spire, narrower umbilicus, more 
oblique aperture, and in being microscopically spirally sculptured 
above, which is not the case with G. kigeziensis. 
Alt. 4:5, diam. maj. 9°25, diam. min. 8 mm. 
Aperture: alt. 4, diam. 3°75 mm. 
Hab. Mukanda, near Lake Kivu. (Robin Kemp.) 
GUDEELLA MUKANDAENSIS, Var. MUTANDANA, var.n. (PI. IIL. 
fig. 12.) 
Shell differing from the typical form in being rather more 
widely perforate, darker in colour, with oblique columella margin 
and more rounded aperture. 
Alt. 4°75, diam. maj. 9°5 (nearly), diam. min. 7:75 mm. 
Aperture: alt. 4:25, diam. 4°25 mm. 
Hab. Lake Mutanda, 8.W. Uganda. (Robin Kemp.) 
GUDEELLA CONSOBRINA, sp. n. (PI. ITT. fig. 9.) 
Shell differmg from G. mukandaénsis Preston in its colour, 
which is of a creamy hue, much more inflated form, more verti- 
cally descending columella margin, less oblique, wider, and more 
compressed aperture, and in the total absence of spiral sculpture. 
Alt. 5, diam. maj. 9°25, diam. min. 8 (nearly) mm, 
Aperture: alt. 4°25, diam. 4:25 mm. 
Hab. Mukanda, near Lake Kivu. (Robin Kemp.) 
GUDEELLA NEMORUM, sp. n. (PI. IIT. fig. 24.) 
Shell perforate, depressedly turbinate, thin, somewhat polished, 
very light reddish brown; whorls 5, regularly increasing, not 
convex, the last slightly shouldered above, sculptured with very 
Proc. Zool. Soc. London, 1899, p. 583, pl. xxxiii. figs. 16, 17, 18. 
Proc. Malac. Soc. London, x. p. 285, 1913. 
