Photinvla.'] GASTROPODA. 133 



the aperture. Epidermis very thin, shining. Spire conoidal, sides 

 convex, height a little less than that of the aperture. Protoconch 

 small, depressed convex, of 2| smooth whorls, yellowish-white, with 

 1 or 2 pink spiral bands. Whorls 4 to 5, the last large, convex, the last 

 angled or rounded at the periphery ; base slightly convex, impressed 

 in the middle. Suture linear. Aperture large, round, inside smooth 

 and highly iridescent. Outer lip convex, sharp, edged with a narrow 

 white opaque band. Columella subvertical, arcuate, simple, slightly 

 expanded, and nearly covering up the umbilicus. 



Diameter, 8 mm. ; height, 8 mm. (type). 



Dentition. Thiele, in Das Gebiss d. Schnecken. 



Type in the Mus. Hist. Nat., Paris. 



Hob. Auckland Islands (type) ; Antipodes and Campbell Islands 

 (Captain Bollons) ; Snares (Professor Chilton). 



Var. rosea, Hutton, 1873. 



Chrysostoma rosea, Hutt., C.M.M., 36. Gibbula rosea, Hutt., Man. Conch. 

 (1), xi, 216 ; Sxiter, P. Mai. S., ii, 276. Margarita rosea, Hutt., J. de 

 Conch., 1878, 35; M.N.Z.M., 103. 



Shell small, globosely conoidal, subperforate, white or greenish, 

 with 4 to 5 spiral blood-red bands and spots of the same colour on the 

 last whorl. All the other characters are the same as in the species, 

 and it is absolutely nothing else but a colour variety of it. 



Diameter, 5-75 mm. ; height, 3-75 mm. (type). Diameter, 7 mm. ; 

 height, 7 mm. (Auckland Islands specimen). 



Dentition unknown. 



Type in the Dominion Museum, Wellington. 



Hob. Stewart Island (type) ; Bounty Islands ; Auckland Islands ; 

 Campbell Island (Filhol) ; Antipodes Island (Captain Bollons). 



Remark. Specimens from Antipodes Island are yellowish-white 

 and the spiral bands purplish-brown, sometimes red on the spiral 

 whorls. 



2. Photinula decepta, Iredale, 1908. 



Photinula decepta, Iredale, T.N.Z.I., xl, 1907 (1908), 382. 



Shell small, globosely conoidal, imperforate, thin, fragile. Sculp- 

 ture : Very finely spirally striated, 30 striations on the penultimate 

 whorl, obscured on the last whorl by growth-lines. Colour variable, 

 typical ; the 2 apical whorls white or pinkish-white, on the third 

 whorl 2 purplish bands equidistant from the sutures arise ; the 4th 

 whorl is wholly purplish-black, as is the last whorl ; in some shells 

 these bands persist on to the last 2 whorls, additional bands arising 

 so that on the last whorl 5 distinct bands can be counted ; rarely 

 additional minute bands can be seen between these principal bands : 

 in some cases the purple on the last whorl breaks up into irregular 

 dashes : the Shag- Point shells are[ mostly light-coloured ; somej; have 



