ASTRA LIUM. 239 



A. NOBiLis Gray, 1847. PI. 63, fig. 37. 



" Shell^trochiform imperforate, pale white ; spire conical ; whorls 

 nearly flat, smooth, the outer edge of the upper whorls being fui-- 

 nished with a broad expanded margin, which is broadly plaited on 

 the upper side ; the plaits becoming thicker and more prominent on 

 the edge of the last whorl ; front [base] of last whorl with regulai* 

 sj)iral ridges, each crossed with regular imbricate-arched scales, the 

 second and third near the circumference largest, and those nearest 

 to them closer together" aperture crenated, throat silvery pearly." 



Darnley Is., S. Pacific. 



The original description and figure are copied. I have not seen 

 this species ; it is evidently closely allied to A. rotulariuvi. 



A. FiMBRiATUM Lam., 1822. PI. 54, figs. 46-54. 



Shell conic, more or less depressed, imperforate ; whorls 5-6 

 flattened above, obliquely striate, generally more or less longitudi- 

 nally finely plicate below the sutures, and spirally lirate ; periphery 

 acutely carinated, the margin pinched out into a thin, generally 

 undulating flange or rim, which is usually projecting above the sut- 

 ures; last whorl generally descending; base slightly convex, spir- 

 ally lirate and radiately striate ; aperture very oblique, transverse- 

 oval, channelled at the outer angle, white or pinkish within ; colu- 

 mella broad, flat ; color grayish, variegated above with brown, base 

 lighter. Alt. 20, diam. 26 mill. 



Australian Seas ; Tasmania. 



An extremely mutable type. The following* varieties have been, 

 considered distinct species, but I cannot find characters stable 

 enough to separate them. 



Var. piLEOLUM Reeve, 1842. PL 54, figs. 53, 54. 



Shell grayish white ; sculpture obsolete above and nearly so be- 

 low ; keel very broad and thin. Alt. 23, diam. 34 mill. 



T. limbij'erus Kiener is synonymous. Neither was ever described 

 by their authors. 



The aperture is often more deeply deflected than in the specimen 

 figured. The young are plicate above as in A. fimhriatum. 



Var. cucuLLATUM Kiener. PI. 54, figs. 50, 51. 



Shell conical ; whorls 7-8, somewhat plicate, and except the up- 

 per ones, densely granose-lirate above and below. 



Alt. 35, diam. 46 mill. 



More conical and elevated than the type. 



