Hurron.—On Rhachiglossate Mollusca. 225 
Genus Voluta, Linné. 
Shell ovate, the aperture narrow. Operculum none. Teeth tricuspid. 
Sub-genus Alcithoe, H. and A. Adams. 
Shell thick, the spire elongated, with a papilliform apex; outer lip 
expanded and more or less reflexed. 
Vonura PACIFICA, Solander, Cat. Pojdand Museum, No. 4089 (1788); 
Quoy and Gaimard, Voy. Astrolabe, Zool. ii., p. 625, pl. 44, f. 6; Gray, 
Figs. Moll. Anim., i. pl. 27, f. 3; Sowerby, Thes. Coneh., i., pl. 48, f. 26; 
Tryon, Man. Conch., iv., pl. 98, £. 97; Homb. and Jacq., Voy. au Póle 
Sud, Zool. v., p. 72, pl. 19, £ 7; Gray, 1. e., ii., pl. 268, f. 1. Buccinum 
arabicum, Martyn, Univ. Coneh., pl. 52 (1784). 
Hab. Throughout the N. Island; Cook Straits; Banks Peninsula; 
Foveaux Straits. 
Fulvous, with dark brown anastomosing markings, forming three or 
four spiral bands. Whorls with a row of tubercles; columella with four to 
six plaits. 
Var. ELONGATA, Swainson. 
Fulvous, and without tubercles. 
The dentition is figured in Trans. N.Z. Institute, vol xv., pl. xiii., f. v. 
VoLuta eracus, Swainson, Exotic Conchology, pl. 42 (1821); Griffith 
in Cuvier’s Animal Kingdom, vol. xii., pl. 40, £ 4; Sowerby, Thes. Conch., 
i., pl. 55, f. 117 ; Tryon, Man. Conch., iv., pl. 28, f. 99. Voluta fusus, Quoy 
and Gaimard, Voy. Astrolabe, Zool. ii., p. 627, pl. 44, f. 7-8 (1833) ; Tryon, 
l.c. iv., pl. 28, f. 98. 
Hab. Auckland. 
Fulvous with anastomosing flexuous markings which do not form bands. 
The nodules elongated : columella with four plaits. 
Smaller and narrower than the last species. The dentition is not known. 
Sub-genus Cymbiola, Swainson. 
Shell thin, the spire elongated, with a papilliform apex ; outer lip 
sharp, occasionally slightly expanded. 
Vonura LUTEA, Watson, Jour. Lin. Soc., Zool. xvi, p. 881 (1882) ; N.Z. 
Journal of Science, i., p. 441 
Hab, 200 miles west of Cupé Campbell in 275 fathoms. 
Pale buff with a high blunt spire, largish mouth, slightly reflexed outer 
lip, and four plaits on the columella. 
I have not seen this species, which was obtained by the Challenger Ex- 
pedition. The dentition is unknown. 
Sub-order ODoNTOG 
Dentition, 1—1—1; the laterals not ab, broad, many-cuspid 
(Turricula is said to differ from this.) 
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