26 GASTEKOPODA. 



95. C. trailli, S P- nov. Shell small, thin, oval ; spire short, 

 whorls angled ; the entire shell very finely cancellated ; columella with 

 three oblique folds ; outer lip slightly crenate. White. Length, '25 ; 

 breadth, '17 ; angle of spire, 70. 



Stewart's Island. 



FAMILY TRICHOTKOPID^. 

 Sh^ll spiral, more or less turbiuated ; columellu smooth. 



TBICHOTROPIS. 



Shell turbinated, thin, whorls keeled ; mouth large, columella ob- 

 liquely truncated. 

 .Northern seas. 



96. T. inomata, up. nov. Small, cancellated, spire produced, 

 without fringes ; a short anterior canal. Pale brown, or white. 

 Length, -43 ; breadth, '25 ; angle of spire, 40. 



Stewart's Island. Chatham Islands. 



FAMILY ( 



Shell spiral, elongate, many-whorled ; aperture channelled in front, 

 and with a less distinct posterior canal. Rostrum wrinkled ; ten- 

 tacula lateral ; eyes on the outer side of the base ; foot short, broad ; 

 operculum horny, spiral. 



CERITHIUM. 



Shell turreted ; aperture oval, oblique ; anterior canal short, trun- 

 cate or recurved ; operculum semicircular, pauci-spiral. 

 World-wide. 



97. C. bicarinata, Qra,,/, Die/. N.Z., ii., p. 241. Whorls 



rather convex, obsoletely spirally striated, and transversely plicated - t 

 the body whorl with two spiral ridges on the anterior end, separated 

 by a concave groove. Blackish purple, generally with a rough brown 

 or reddish brown coating. Length, I 1 12 ; breadth, ~38 ; angle of spire, 

 23. 



Common. 



98. C. alternatllHl, sp. nov. Whorls deeply spirally grooved, 

 with a small ridge in the bottom of each groove, and transversely 

 plicated ; outer lip expanded. Yellowish brown ; interior white, with 

 spiral bands of purplish black. Length, '95 ; breadth, '38 ; angle of 

 spire, 23. 



Tauranga. 



99. C. SUbcarina, Sowerfy ; C. Australia, Gray, Die/. N.Z., 

 ii., p. 241 ; nee. Quoy, Voy. Astrolabe, v. 3, p. 55, f. 7. Whorls nearly 

 flat, slightly transversely plicated; body whorl with two spiral grooves 

 at the anterior end. Brownish black, often with a brown coating ; 

 interior dark pui'ple, with one or two lighter bands. Length, '45 ; 

 breadth, '17 ; angle of spire, 28. 



Common. Chatham Islands. 



