446 GASTROPODA. [Pectinibranchia. 



shouldered, the shoulder flat or very lightly concave ; body-whorl 

 lightly inflated at the middle, very little contracted below. Suture 

 not deep, somewhat undulating. Aperture high, narrowly ovate, 

 lightly channelled and canaliculate above, but little narrowed and 

 deeply notched below. Outer lip somewhat thickened, rounded and 

 a little reflected outwardly, smooth, vertical, sometimes a little sinuate 

 at the middle, strongly retrocurrent towards the suture. Columella 

 subvertical, usually with 5 strong and nearly equidistant oblique 

 plaits, the lowest extending to the sharp beak below ; sometimes 

 1, 2, or 3 smaller folds are intercalated between the stronger ones, 

 or the number of plaits may be reduced to 4 only. Inner lip thin, 

 spreading broadly over the body-whorl, with a rounded free edge ou 

 the left side, and separated by a groove from the broad lamellate and 

 flat fasciole, which may be bounded towards base by a narrow keel. 



Diameter, 50 mm. ; height, 126 mm. : angle of spire, 40-48. Dia- 

 meter. 46 mm. ; height, 117 mm. Diameter, 46 mm. ; height, 98mm. 



Animal having a large foot, squarish in front, not extending be- 

 yond the spire ; head broadly rounded, with 2 short tentacles, the 

 eyes situated at some distance outside their bases. Siphon not very 

 long. Colour wine-purple, dusted with yellow ; hood bordered with 

 reddish. 



Dentition (Hutton, T.N.Z.I., xv, 121, pi. 13, f. U). Formula 

 O+l-l-O: central tooth arched, with 3 large subequal triangular 

 cusps, occupying the whole of the posterior margin. 



Type lost. 



Hab. North and South Islands, mostly on sandy beaches, bur- 

 rowing in the sand near low-water mark ; in about 15 fathoms in 

 Foveaux Strait ; Kermadec Islands (Captain Bollons). Brought to 

 England by Captain Cook. Solander states that he picked up a 

 specimen on Endeavour Reef, north-east coast of Australia. 



Fossil in the Miocene and Pliocene. 



Maori. Puhauriroa (fide Captain Bollons). 



Subsp. elongata, Swainson, 1821. Plate 48, tig. 6. 



Valuta elongata, Swains., Exot. (Jonck., 1821, pi. 20, 21. l^cu^hdla elongata, 

 Swains., Exot. Conch., eel. Hanley, 23, pi. 20, 21. Vohitn pad/ten, var. 

 i-fonyaia, Swains., M.N.Z.M., 02 ; T.N.Z.I., xvi, 225. ticupliella jmcifica, 

 var. elongata, Swains., Index, 74. 



Distinguished from the species by its more elongate form, the 

 convex, not shouldered whorls, and the almost total absence of nodules. 

 Sculpture consisting of broadly rounded and low axial cost;? on the 

 three whorls below the protoconcli. sometimes obsolete ; the lower 

 whorls are irregularly axially plaited, the plaits sometimes prominent 

 and flatly convex, the whole shell ornamented with fine growth-lines. 

 Colour the same as in the species. Spire usually somewhat higher 

 than half the height of the aperture. Whorls moderately convex, 



