o:) — 



rather erectly dilatecl below; apertiire very narrowly and elongately inver- 

 sely aurifomi. 



Alt. 17.75, diam. maj. 7.75, diam. min. 7 mm. 



Aperture : ait. 12, diam. -ma]. 2.5 mm. 



Hab. — Gazi, British East Africa (Robin Kemp). 



Diflering from A. tornatclliniforinis Pet. (')^ to which it is closely 

 allied, in its finer sculpture on the upper part of the whorls and in 

 having no decussate sculpture at ail on their lower portion. 



Physopsis choziensissp. n. — PL V, fig. 12. 



Shell narrowl)^ perforate, rather elongately ovate with ver}- obtuse apex, 

 very pale brownish-j'ellow; whorls 4, rapidly increasing, the last large, 

 shouldered above and microscopicalh' sculptured with verj' fine, wav}', 

 transverse ridges which occasionallj^ converge ; suture impressed ; perfora- 

 tion very narrow, almost entirely covered by the outward réflexion of the 

 columella; columella white with the exception of the extrême outwardly 

 reflexed margin which is of the same colour as the remainder of the shell, 

 rather obliquely descending, obliquely truncate below; labrum acute; aper- 

 ture verj- elongately, inversely auriform. 



Alt. 14.75, diam. maj. 9, diam. min. 8.5 (nearty) mm. 



Aperture ; ait. 9.25, diam. 4.5 mm. 



Hab. — Chozi River, a tributarv of the Chambzi^ flowing into 

 Lake Bangweolo trom the east. 



Physopsis rekwaensis sp. n. — PI. V, fig. 11. 



Shell narrowly perforate, ovate, sinistral, pale j^ellowish-olive; whorls 4, 

 rapidly increasing, not shouldered, the last large, sculptured with somewhat 

 wav}^, transverse ridges crossed b}' very fine, spiral lines ; suture impressed; 

 perforation ver}' narrow, deep, partly concealed by the outward reflexion of 

 the columella; columella vitreous, diaphanous, nearly vertically descending, 

 bearing a sharp, broad^ slightly twisted_, white lamella below, broad and out- 

 wardly reflexed above and diffused into alight^ pariétal callus which reaches 

 the upper margin of the labrum; labrum acute, dilated and slightly reflexed 

 below; aperture elongately ovate. 



(') Proc. Zool. Soc, London, 1854, p. 



