618 MR. CRAVEN ON SHELLS FROM SOtlTH AFRICA, [NoV. 30, 



position of tlie apex, and the sculpture. In A. cajf'er the radiate striiie 

 are much more developed, and the apex is recurved so as to overhang 

 the margin, and is <ibout one quarter of the length of the shell from 

 tlie extremity, whereas in A. transvaalensis it is only a little recurved 

 to one side and is much nearer the centre. 



CouBicuLA oLiPHANTENSis, sp. nov. (Plate LVIL fig. 12.) 



Shell subcircularly trigonal, solid, subequilateral, marked with 

 rather fine concentric striae ; epidermis of a greenish yellow colour ; in- 

 terior of shell nearly white, in young specimens of a beautiful pinkish 

 orange towards the umbones; umbones rather prominent; lateral 

 teeth lamellar, finely serrated, produced ; hinge-teeth three on each 

 valve, equidistant. Breadth 12 millims., length 10^, thickness 7\. 



Locality. Oliphant's River, Transvaal ; very plentiful. 



This shell resembles C. africana, Krauss, in the dentition of the 

 valves, but differs from that species in its smaller size, finer strise, 

 much paler-coloured epidermis, and different-coloured interior. 



Unio caffer, Krauss, Siidafr. Moll. p. 18, pi. 1. fig. 14; Reeve, 

 Conch. Icon. pi. 41. sp. 220. 



A very marked variety of this species occurred to me in the Riet 

 Spruit, near Wyuberg, in the Orange Free State, differing from the 

 type in its larger size, much more acuminated posterior, rather 

 rounded basal margin, and thicker hinge-teeth. Breadth 78i millims., 

 length 39, thickness 2-5. 



2. Description of three new Species of Land-Shells from 

 Cape Colony and Natal. By Alfred E. Craven, F.Z.S., 

 F.L.S., E.R.CI.S., &c. 



[Received October b, 18S0.] 

 (Plate LYII.) 



Pupa (Vertigo) sinistrorsa, sji. nov. (Plate LVII. fig. 8.) 



Shell sinistral, subperforate, ovately conical, of a horny-brown 

 colour, paler near the apex, rather glossy, faintly striated* by the 

 lines of growth; whorls 51, very convex, gradually increasing, the 

 last two equal in diameter ; suture deep and well defined ; apertnrc 

 nearly circular, armed with four internal teeth, viz. one large tooth 

 situated on the paries near its centre, another smaller tooth on the 

 columella far within the aperture, another at the base of the outer 

 lip, and a very small one at its centre : labruni outwardly reflexed ; 

 extremities of peristome connected by a thin callosity. Length 3 to 

 3f millims., greatest diameter 2, diameter of aperture 1. 



Localittj. Cajte Rccif, entrance of Algoa Bay : Klein Setjes Bosch, 

 near Beaufort, Cape Colony. Not very abundant. 



