ON SOUTH AFRICAN ENNE^. 55 



externally, and the outer wall bears a double pit corresponding 

 to the bifid labral plait. 



If the dimensions of the type as given in the original 

 description, viz. height 1'75, width 0-75 mm., are correct^ 

 they cannot be considered normal in view of the measure- 

 ments of the remaining available specimens, which are as 

 follows : 



Co-types in collection of J. H. Ponsonby : height x width, 

 2*58 X r06, 2-26 x TOl. Specimens in my collection : 2*25 x 

 1-06, 2-25 X 1-01, 2-06 x 0-96 mm. (figs. 18-20). 



I regard the first of these as being abnormally high. 



Ennea melvilli ii. sp. PL III, figs. 21, 22, 23. 



Shell minute, elongate-oval, rimate, thin, whitish, glossy, 

 transparent, apex rounded ; whorls 6, rather ventricose, very 

 closely, finely sculptured with delicate transverse rib-striae, 

 except the first two, which are smooth ; suture moderately 

 deep ; aperture very small, rather roundly triangular, with 

 white peristome slightly thickened and reflexed and joined by 

 a narrow callus, and furnished with the following plaits and 

 teeth; a broad blade-like parietal plait, a squarish, bifid tooth 

 on the outer lip, a small basal in-running plait, a broad, 

 slightly raised, rounded tooth on the columellar lip, a deep- 

 seated, rounded, scoop-shaped plait on the columella, and a 

 slightly raised ridge within, and nearly parallel to, the basal 

 lip. 



Height 2-12, width 0-91 mm. 



Hab. — Nottingham Road (Taynton) ; also Karkloof 

 (McBean), Curry's Post and Fort Nottingham (Taynton), 

 Dargle and Edendale (Burnup). 



The parietal plait is very prominent, the right edge standing 

 well forward from the general plane of the peristome before 

 entering the aperture ; its left edge is shorter and more 

 internal. The bifid labral tooth arises very near the edge of 

 the peristome, the lower half being rather more internal. The 



