Cattiostomn.] GASTROPODA. 145 



conch small, of 1 whorl, which is smooth, pale or yellowish. Whorls 6, 

 very slightly convex, the last angular at the periphery ; base flat, 

 excavated and white in the centre. Suture not much impressed. 

 Aperture subquadrate, pearly and smooth inside. Outer and basal 

 lip acute, edged with rose, inside slightly callous. Columella sub- 

 oblique, white, slightly reflexed above, subdentate below. Operculum 

 thin, horny, multispiral. 



Diameter Maj., 8 mm. ; min., 7 mm. : height, 7-5 mm. 



Type in the British Museum. 



Hab. Auckland Islands, in 10 fathoms. 



I have not seen this species. 



2. Calliostoma pellucidum, Valenciennes, 1846. Plate 40, fig. 3. 



T rock us pellucidus, Veil., Voy. " Venus," Moll., pi. 4, f. 2. Calliostoma 

 pellucidum, Val., Man. Conch. (1), xi, 334, pi. 65, f. 78 ; x, pi. 41, f. 36 : 

 Suter, P. Mai. S.. ii, 281. Zizypkinus granatus, Chemr. : Reeve, Conch. 

 Icon., f. 2 ; not Trochus granatum, Chemn. 



Shell conical, imperforate, solid, whitish dotted with brown, last 

 whorl sub angular. Sculpture consisting of numerous closely beaded 

 lira. 8 to 12 on the penultimate whorl, and the same number on the 

 last whorl above the periphery, with a few smooth fine line inter- 

 calated ; just at or just below the periphery there is a group of lirulee, 

 closer, smaller than those of the upper surface ; the rest of the base 

 is more or less regularly granose-lirate. Colour yellowish, with a few 

 brown oblique longitudinal streaks ; large squarish brown spots 

 above the suture, and just above the periphery are usually present ; 

 the spiral lirre are closely and minutely dotted with brown and 

 white. Epidermis thin, faintly shining. Spire conical, higher than the 

 aperture, very acute, outlines concave above, slightly convex below. 

 Protoconch small, sharply pointed, white, the first whorl smooth, the 

 second granulose. Whorls 9 to 10, first slowly, then more rapidly in- 

 creasing, flat, the last subangular at the periphery ; base flatly con- 

 vex. Suture very slightly impressed. Aperture oblique, rhomboidal, 

 iridescent and lirate within. Outer lip sharp, very slightly crenulate, 

 edged by a broad white callosity. Columella. arcuate, greyish-white, 

 shining, with a slight tubercle at the base. Inner Up forming a 

 narrow white callosity on the outside of the columella. There is 

 a slight umbilical depression, bounded by a strong rib. 



Diameter, 30 mm. ; height, 30 mm. 

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



Hab. North Island Cape Maria van Diemen, Whangarei, Hau- 

 raki Gulf, from low- water mark to 25 fathoms ; Cook Strait ; Ker- 

 madec Islands. Often found attached to floating seaweeds. 



Fossil in the Miocene and Pliocene. 



