1878.] MR. G. F. ANGAS ON NEW MARINE SHELLS. 861 



moderately solid, whitish tinged with pale rose-colour towards the 

 umbones ; encircled by close-set, subgranular, spreading, flattened 

 ridges, that become broader and closer towards the base ; lunule 

 large, triangular, convex ; umbones tumid ; beaks small, pointed, in- 

 curved ; interior of valves pink, the edges crenate within. 



Long. 8, alt. 8, lat. 5 lines. 



Hab. Natal. In coll. Hanley. 



In this pretty shell the sculpture of the valves approaches that of 

 L. pennsylvanica ; and, as in that species, small fragments of grit 

 and shell are to be found lodging between the overlapping ridges. 



Helix brenchleyi, n. sp. (Plate LIV. fig. 7.) 



Shell imperforate, depressedly trochiform, rather thin, obliquely, 

 irregularly, and obscurely striated, yellowish white, with two dark 

 chocolate bands, thickly crossed with white diaphanous zigzag 

 markings encircling the last whorl, the uppermost band the broadest ; 

 spire obtusely conical, apex white ; whorls 5, flatly convex, sutures 

 impressed, last whorl descending in front, base a little tumid ante- 

 riorly ; aperture oblique, subrhomboidal ; peristome very slightly 

 thickened and expanded, and but little reflexed, the right margin 

 moderately sinuated ; columellar margin somewhat flattened and 

 dilated, with a straight abrupt callus ; the umbilical region and the 

 inner edge of the lip with the reflected portion brown, immediately 

 behind which is a band of pigment-like deposit of a brilliant orange- 

 colour. 



Diam. maj. 11, min. 9, alt. 6^ lines. 



Hab. Ysabel Island ; Solomon Group. Collected by the late Mr. 

 Brenchley. 



A singular shell, having the orange colouring of H. boivini behind 

 the outer lip, but differing from that species in its other characters. 



9. Descriptions of ten Species of Marine Shells from the 

 Province of South Australia. By George French 

 Angas, C.M.Z.S., F.L.S., &c. 



[Received September 19, 1878.] 

 (Plate LIV.) 



Mitra tatei, n. sp. (Plate LIV. fig. 8.) 



Shell ovately fusiform, solid, shining, ochraceous, with a broad 

 deep-chocolate-coloured band next below the sutures, and a second 

 similar band towards the lower part of the last whorl ; whorls 5|, 

 stoutly and distantly longitudinally ribbed, the ribs becoming 

 obsolete towards the base of the last whorl, which is encircled by three 

 or four transverse ridges ; aperture narrowly ovate ; outer lip simple ; 

 columella 4-plaited. 



Long. 3|, lat. 1^ lines. 



