SPECIES OF ZONITIDE FROM EQUATORIAL AFRICA. 791 
the periphery, sculptured throughout with very fine, wavy, spiral 
strie ; suture impressed, margined below; umbilicus narrow, 
deep; columella margin obliquely descending, extending above 
into a thin, parietal callus; labrum acute; aperture rather 
obliquely sublunate. 
Alt. 3, diam. maj. 6, diam. min. 5°25 mm. 
Aperture: alt. 2°5, diam. 2°5 mm. 
Hab. Between Mbarara and Masaka, S.W. Uganda. (Robin 
Kemp.) 
GUDEBLLA usITATA, sp.n. (PI. III. fig. 2.) 
Shell differing from G. consweta Preston in its smaller size and 
comparatively rather more elevated spire, in having half a whorl 
less, and in its more vertical columella and proportionately broader 
aperture; the spiral sculpture is also much finer on the whorls 
than on the base of the shell, while in G. consweta it is regular 
throughout. 
Alt. 2°75, diam. maj. 4°5, diam. min. 4 mm. 
Aperture: alt. 2, diam. 2°5 mm. 
Hab. Between Masaka and Entebbe, 8.W. Uganda. (Robin 
Kemp.) 
GUDEELLA DENSESCULPTA, sp. n. (PI. III. fig. 14.) 
Shell very depressedly turbinate, thin, subhyaline, pale greyish 
straw-colour; whorls 5, regularly increasing, very closely, micro- 
scopically, spirally striate ; suture impressed, callously margined 
below, the marginal callus being rather more coarsely and dis- 
tantly, spirally striate than the remainder of the shell; umbilicus 
narrow; columella descending in a very oblique curve ; labruin 
simple; aperture rather obliquely sublunate. 
Alt. 3°5, diam. maj. 7, diam. min. 6 mm. 
Aperture: alt. 3, diam. 2°75 mm. 
Hab. Kagambah, 8.W. Uganda. (Robin Kemp.) 
GuDEELLA MIME, sp. n. (PI. IIT. fig. 23.) 
Shell differing from G. densesculpta Preston in its much 
smaller size, in having one whorl less, and in its darker colour, 
which is of an amber hue; the last whorl is subangulate above, 
the columella margin descends vertically and the aperture, though 
sublunate, is less oblique. 
Alt. 2. diam. maj. 3°75, diam. min. 3°25 mm. 
Aperture: alt. 1°75, diam. 1°75 mm. 
Hab. Kagambah, 8.W. Uganda. (Robin Kemp.) 
GUDEBLLA ELGONENSIS, sp.n. (PI. III. fig. 19.) 
Shell turbinate, not very depressed, polished, shining, pale 
brownish horn-colour; whorls 5, regularly increasing, the last 
rounded, the remainder flattish, sculptured with very fine and 
closely-set, microscopic, wavy, spiral stria, the same sculpture 
also occurring on the hase of the shell; suture impressed, very 
