SPECIES OF ZONITIDE FROM EQUATORIAL AFRICA, 795 
fine, closely-set, wavy, spiral strive ; suture impressed, margined 
below ; base of shell sculptured as above ; umbilicus rather wide, 
deep ; columella margin outwardly expanded, descending in a 
very oblique curve, diffused above into a thin, well-defined, out- 
wardly projecting, parietal callus which reaches the upper margin 
of the labrum; labrum acute, slightly sinuous, projecting in 
front, receding below and slightly above ; aperture rather broadly 
obliquely sublunate. 
Alt. 3°75, diam. maj. 7, diam, min. 6 mm. 
Aperture: alt. 3, diam. 3°25 mm. 
Hab. Forests to the north of Mount Kenia, British East 
Africa, (A. Blayney Percival.) 
GUDEELLA PALLIDIOR, sp.n. (Pl. III. fig. 5.) 
Shell depressedly orbicular, greyish yellow, polished, shining ; 
whorls 4, regularly increasing, sculptured with microscopic, 
closely-set, spiral striz ; base of shell sculptured with fine, slightly 
distant and wavy, revolving, scratch-like striz; suture impressed, 
margined below; umbilicus narrow, very slightly overhung by 
the outward expansion of the columella; columella margin 
descending in an oblique curve; labrum simple, whitish at the 
extreme edge; aperture rather broadly, obliquely, and compressedly 
sublunate. 
Alt. 3, diam. maj. 5°75, diam. min. 5 mm. 
Aperture: alt. 2°5, diam. 2°75 (nearly) mm. 
Hab. Urguess, British East Africa, (A. Blayney Percival.) 
GUDEELLA TRIBULATIONIS, sp. n. (Pl. IIT. fig. 4.) 
Shell depressedly turbinate, shining, pale reddish brown; 
whorls 4, sculptured throughout with fine, closely-set, wavy, 
spiral striz ; base of shell pale yellowish grey ; suture impressed, 
narrowly margined below, the margin being of a whitish colour; 
umbilicus deep, but very narrow ; columella vertically descending 
above, slightly oblique, and curved below; labrum simple; 
aperture compressedly sublunate. — . 
Alt. 3°5, diam. maj. 5°75, diam. min. 5 mm. 
Aperture: alts 2°5, diam. 2°75 (nearly) mm. 
Hab. Mount Elgon, 8.W. Uganda. (C. W. Woodhouse.) 
ELGONELLA, gen. nov. 
Shell rather small, corneous, perforate, turbinate or depressedly 
so, marked only with transverse plications or growth-strie, and 
having the labrum slightly reflexed. 
Genotype: LZ. euloteformis Preston. 
The genus should also inelude :— 
g 
Zingis gaziensis Preston, from Gazi, British East Africa, Ann. 
Mag. Nat. Hist. London, ser. 8, vol. vii. 1911, p. 467, pl. xi. fig. 10. 
Froc. Zoou, Soc.—1914, No. LIV. 54 
