418 MR. G. F. ANGAS on NEW MARINE SHELLS. [May 4, 



9. Descriptions of three Species of Marine Shells from 

 Port Darwin, Torres Straits, discovered by Mr. W. T. 

 Bednall; and of a new Helix from Kangaroo Island, 

 South Australia. By George French Angas, C.M.Z.S., 

 F.L.S., &c. 



[Eeceived April 20, 1880.] 

 (Plate XL.) 



VoLUTA (Aulica) bednalli (Brazler). (Plate XL. fig. 1.) 



Shell narrowly elongately ovate, solid, white, with four narrow trans- 

 verse red or briglit orange bands on the last whorl, the upper band 

 close next the suture, the other three at equal distances down the 

 whorl, which are crossed by about twelve similar, narrow, longitu- 

 dinal, zigzag bands of the same colour, showing a tendency to spread 

 into irregular spots between the second and third transverse bands ; 

 whorls 6, flatly convex, marked with fine longitudinal striae or lines 

 of growth, which are more prominent on the upper whorls ; the last 

 whorl moie than two thirds the length of the shell ; s|)ire elevated, 

 apex papillary and obtuse ; aperture somewliat narrow, white within, 

 columella nearly straight, furnished with four plaits, the two upper 

 ones the largest and least oblique, the two lower ones very oblique ; 

 outer lip simple. 



Length 3 inches 4 lines, diam. 1 inch 4 lines. 



Hab. Port Darwin, Torres Straits, North Australia (JF. T. Bed- 

 nail) . 



This remarkable Volute differs from any other known species in 

 its very singular style of painting, which gives it a latticed appearance, 

 the brilliant red, narrow, zigzag descending bands crossing the 

 straight transverse ones at right angles. Mr. Brazier, of Sydney, has 

 already bestowed on this beautiful shell the name of its discoverer, 

 Mr. W. T. Bednall ; and I have much pleasure in retaining that 

 name, and figuring it in the Proceedings of the Zoological Society of 

 London. 



MuREX (Pteronotus) BEDNALLI (Brazier). (Plate XL. fig. 2.) 



Shell fusiform, rather thin, pale cream-colour, with three very 

 broad, flattened, fin-shaped scabrous varices ; whorls 8, sculptured 

 with somewhat distant elevated transverse ridges that spread out and 

 become more developed at the back of the varices, which are striped 

 and tinged with brown, between which are very numerous close-set, 

 fine, hair-like concentric striae ; spire prominent, apex pointed ; aper- 

 ture small, narrowly pyriform ; columella slightly arched, smooth, 

 shining, with a brown hollow tooth projecting forward at the base, 

 and another longer one curving outwards and backwards at the junc- 

 tion of the middle varix with the canal ; outer lip very broad and 

 flat, with wide flattened grooves towards the outer edge, the interstices 



