•itt2 xMr. M. Coiniolly on 



G. acutideiis: the upper columcllar denticle is slightly 

 more removed from the margin, and the lower oidy enters 

 a very short distance and is acute, not hollow ; the two 

 teeth on the outer lip are closer together than in cavidens 

 and the lower is acute, not square ; the shell examined 

 measures ll'OxG'l mm. 



G. hitzeensis : the upper columellar denticle is more pro- 

 minent than in either of the foregoing, equally inset with 

 that of acutidens; the lower enters deeply but less downward 

 than in cavidens ; the teeth on the outer lip are as in cavidens. 



Gulella cancellata, sp. n, (PI. XIV. fig. 36.) 



Shell of moderate size, perforate, cylindriform, semi- 

 transparent, glossy with a silky sheen, pale olivaceous. 

 Spire produced, sides parallel, apex flatly mamillate. Whorls 

 6^, convex, first 3^ rapidly increasing, last 3 almost equal ; 

 the first 2 whorls extremely faintly, closely, microscopically, 

 transversely striate, with very faint, fine, rather distant spiral 

 striae commencing towards the end of the 2nd whorl, where 

 there are about 8 vissible, and continuing on the remainder, 

 cutting through the close, fiue, curved, oblique transverse 

 stria3 which cover the last 3^ whorls ; suture simple, im- 

 pressed. Aperture quadrate ; peristome white, shining, 

 reflexed; columella straight, rima pronounced ; callus white 

 and thick ; dental process five-fold ; a stong incurved lamella 

 at the junction of paries and outer lip; 2 well-defined teeth 

 on the outer lip, arising from one broad base which cor- 

 responds to a small external depression ; a rather smaller 

 tooth, corresponding to a minute external depression, on the 

 centre of the base, these 4 teeth being nearly equidistant ; 

 and a strong sharp fold, with a downward slant, about two- 

 thirds way up the columella. 



Long. 6*5, lat. 3 ; apert., alt. 2*0, lat. 1*2 ; last whorl 

 3'5 mm. 



Var. ex forma minor. (PI. XIV. fig. 37.) 



Kesembles the type in all external features, but contains 

 only 5 whorls and is considerably smaller, measuring : 



Long. 4-3, lat. 2-2; apert., alt. 1-2, lat. 0-9; last whorl 

 2"G mm. 



Htih. Kenya, Larogi Hills (Percival). 



A beautiful species, noticeable for its criss-cross sculpture 

 and very regular dentition. G. lima (Preston), which has 



