174 the proceedings of the linnean society 



19. — Tritonium (Guttunrium) encausticum. 

 Triton eucausticus, Reeve, Proc. Zool. Soc, London, 1844, 

 p. 115. 



„ ,, ,, Conch. Icon, pi 12, species 43. 



Hub. Darnley Island, Torres Straits, 30 fathoms. 



19a. — Tritonium (Epidromus) Angasi. n. sp. 



Shell fusiform, turrited, thin, with 8 distinct rounded varices ; 

 spire slightly twisted in the centre, apex obtuse, whorls 7, slightly 

 convex, sculptured with longitudinal fine ribs, transversely lined, 

 interstices with veiy minute stria?, suture rather dee}), crenulated 

 at the edge, whitish, besprinkled with chestnut brown spots, blotch 

 of the same colour somewhat square in front of the varices ; the 

 back of the last whorl showing more of the irregular nearly obso 

 lete brown spots ; columella or inner lip straight, thickened with 

 a white expanded plate of callous, smooth, outer lip thin at its 

 edge, thickened behind, minutely denticulated within, aperture 

 oblong ovate, white within, canal very short, recurved. 



Length 10, breadth 3, height 21 lines, length of aperture 3 lines. 



Hzb. Darnley Island, Torres Straits, 30 fathoms, rough sand 

 and coral bottom. Sue Island, Torres Straits, 11 fathoms, found 

 with mother-o'-pearl Margaritifera margaritifera, Linn. 



I have named it with great pleasure in honour of Mr. George 

 French Ang.is, F.L.S., C.M.Z.S., London, whose indefatigable 

 exertions have made us acquainted with many new and rare species 

 of shells from Australia and Western Polynesia. 



It differs from Epidromus Coxi, Brazier, from .New South Wales, 

 by having coarser sculpture, varices larger, more distorted at the 

 third and fourth whorl from the aperture, by one slightly bulging 

 to the right, and the other to the left, the outer lip thin at the 

 edge, very much thickened behind, and more strongly crenulated 

 at the suture. 



20. — DlSTORSIO DECIPIENS. 



Triton decipiens, Reeve, Proc. Zool. Soc, London, 1844, p. 121. 



,, „ „ Conch. Icon. pi. 20 species 102. 



Hah. Darnley Island, Torres Straits, 20 fathoms, sandy bottom. 



