40 GASTEROPODA. 



* 175. B. Variant, BecJc. Variable in colour, white, purple, 

 rose, or black ; plain or banded, sometimes with longitudinal wavy 

 lines. Length, "6. 



West Coast of the South Island. Tasmania. Cape of Good Hope. 



Orbicular, depressed, largely umbilicated ; whorls spirally grooved, 

 the body whorl rounded ; umbilicus surrounded by a striated callosity ; 

 columella terminated in front by one or two tubercles. 



176. M. sealandica, sp. nov. Spire acute, whorls deeply 

 spirally grooved, some of the ridges sub-granular ; umbilicus trans- 

 versely finely striated. Brownish white, with radiating flexuous bauds 

 of brownish purple. Length, '2 ; breadth, '3 ; angle of spire, 80. 



GIBBULA. 



Conical, solid, generally umbilicated ; aperture sub-rhomboidal, 

 the angles rounded ; columella gradually arched ; operculum of many 

 gradually enlarging whorls. 



177. G. SangUinea, Gray, Diejf. N.Z., ii., p. 238. Whorls 

 rather convex, spirally striated ; mouth nearly round ; imperforate. 

 White, with interrupted bright pink spiral lines. Length, '2 ; breadth, 

 '2 ; angle of spire, 62. 



178. G. nitida, Adams and Angas, Proc. Zool. Soc., 1861,^?. 36. 

 Whorls slightly rounded, spirally striated; apex obtuse; perforate. 

 Purplish black. Length, '45 ; breadth, '4 ; angle of spire, 60. 



Common. 



FAMILY HALIOTIDJG. 



Shell spiral, depressed, ear-shaped or trochiform ; aperture large 

 nacreous ; outer lip notched or perforated ; no operculum. 



HALIOTIS. 



Ear-shaped, with a small flat spire ; aperture very wide, iridescent, 

 exterior striated, dull ; outer angle perforated by a series of holes, 

 those of the spire progressively closed. Muscular impression horse- 

 shoe-shaped, the left branch greatly dilated in front. 



Widely-spread. 



170. H. iris, Lam ark, I.e., ix., p. 23. Spire small, obtuse ; outer 

 lip continuous and produced beyond the body whorl ; columella slightly 

 concave, the posterior end not carved into a spiral. Outside rugose, 

 plicated. Outside pale brownish white ; interior dark metallic blue 

 and green, with yellow reflexions and an iridescent play of colours ; 

 paler in the young. Breadth, about 6'5 inches. 



Common. Chatham Islands. 



ISO. H. ailStralis, LamarJc, I.e., ix.,/>. 25. Spire large, obtuse, 

 body whorl with obliquely longitudinal plications crossed by fine 

 transverse rough strias ; posterior portion of outer lip not projecting 

 beyond the body whorl ; posterior end of columella produced into a 



