from Portuguese South-east Africa. 121 



naked eye; suture siuiple, souiewhiit oljli(|ue, pronounced, 

 but not deep. Aperture elongate, acuniiuate-ovate ; peri- 

 stome thin, simple ; outer lip a little curved outward, well 

 arcuate forward below the suture, receclinj; more gradually 

 to tlie base; columella weak, concave, almost impcrce[)tibly 

 truncate. 



Long. lU-8, lat. 2-8 ; apert., alt. 'S'3, lat. 1-2; last whorl 

 5*7 mm. 



Ti/pe-hcality. District north of Maccquece {B. Cresay). 



Aitriculastru acuta, sp. n. 



Shell of fair size, fusifortn, imperforate, ratlier solid, 

 l)leachcd white aiul dull iu the typt-, but [)robably glos«y and 

 creamy-olivaceous in fresh condition. Spire somewhat pro- 

 duced, with straight sides meeting at an angle of about 48°; 

 apex acute. ^VhorU 7, almost Hat, regularly increasing, 

 each being a))out one-third greater iu altitude than its pre- 

 decessor, sculptured with very faint, close, regular, almost 

 straight, transverse striie ; suture extremely shallow, strongly 

 margined below. Aperture inverse elongate-auriform, very 

 acute at apex and uarrowly rounded at base ; outer lip 

 simple, blunt, gently outcurved, straight in profile ; colu- 

 mella calloused, short and straight, furnished with two 

 deeply iiirunning folds, of which the upper is by far the 

 most prominent. 



Long. 17-8, lat. 80 ; apert., alt. 10-3, lat. 2*7; last whorl 

 13*3 mm. 



Type-locality. Estuary of Nkomati River, Rikatla (//. A. 

 Junod) . 



Hippeutisjunodi, sp. u. 



Shell small, discoid, umbilicate, thin, smooth, shining, 

 semi-transparent, reddish corneous. Spire much impressed. 

 Whorls 4, rapidly increasing, each rising considerably above 

 its predecessor, the last, which comprises practically the 

 whole shell, rounded and convex above, sloping somewhat 

 abruptly downward to the rouudly-kcelcd base, slightly 

 concave beneath ; microscopically sculptured on both sides 

 with close transverse striic of irregular prominence, undu- 

 lating with the curves of the outer lip ; suture impressed. 

 Aperture barbate, pointing slightly downward in profile, 

 squarely quadrate from beneath ; peristome thin, simple, 

 the curve of the outer li[) at first receding infinitcsimally, 

 then advancing slightly and receding rapidly above, almost 



