50 TROCHUS. 



T. LiMBATus Quoy et Gaimard. PL 11, figs. 39, 40. 



Shell depressed eonoidal, carinate at periphery, umbilicate, whitish 

 or yellowish, maculated with brown, generall)^ with a series of 

 blotches at periphery and beneath suture, the intervening space 

 unicolored or more or less tessellated ; base tessellated or radiately 

 flamed ; spire low conical, apex acute, smooth ;• whorls 5 to 6, convex 

 just below the sutures, then flattened, and at the periphery carinated '> 

 sutures subcanaliculate ; last whorl scarcely descending anteriorly, 

 above with 6 to 8 spiral closely granose einguli, beneath with 7 to 9 

 similar concentric einguli, the interstices both above and below 

 closely, sharply, obliquely, microscopically striate ; base slightly 

 convex ; aperture tetragonal, oblique ; outer lip four or five-lirate 

 within, the upper fold somewhat enlarged, subdentiform ; basal mar- 

 gin and marginal rib of the umbilicus finely plicate ; columella 

 oblique, nearly straight, its edge reflexed and plicate-dentate ; term- 

 inating below in a small square denticle, inserted above upon the 

 side of the umbilicus ; umbilicus rather wide, funnel-shaped. 



Alt. 14, diam. 18 mill. 



Adelaide, Victoria, Purt Western, Australia. 



Trochus limbattis Quoy et Gaimard, Voy. de V Astrolabe, iii, p. 

 245, t. 63, f. 1-6.— Philippi, Conch. Cab. p. 212, t. 31, f 10-12.— 

 Fischer, Coq. Viv. p. 214, t. 71, f. 2. — T. depressus ("Gmel.") 

 Philippi, Conchyl. Cab., ]>. 77, t. 14, f. 6. 



The coarser granulation will serve to separate this form from the 

 several following species ; the reflexed, crenulated edge of the colum- 

 ella is also characteristic. The basal margin of the aperture is 

 expanded, in fully adult individuals. 



T. VARiEGATUs A. Adanis. PI. 14, fig. 19. 



Shell depressed-conical, light colored, variegated with reddish 

 brown ; whorls tumid above, ornamented with granose einguli, the 

 interstices longitudinally striate ; last whorl acutely angulate ; base 

 plane ; umbilicus crenulated ; columella twisted above, the margin 

 reflexed, crenulated, terminating below in a biplicate tooth ; lip 1am- 

 ellarly toothed within, the upper tooth larger. (Ad.) 



Id. Of Siquij or, under stones. (Cuming). 



Clancidus variegatus A. Ad. P. Z. S. 1851, p. 160, no. 27. — Teni- 

 soN-WooDS, Proc. Roy. Soc. Tasmania, 1877. p. 40. — Tapparone- 

 Canefri, ZooL del Viaggio della Fregata Magenta, ]). 57, t. 1, f, 11, 



