TROCHUS. 81 



within, and surrounded by a row of black spots at the margin ; col- 

 umella nearly straight, with a small tooth-like projection at either 

 end, the margin of the false-umbilicus dentate, with an incurved 

 tooth above, and crenate at the base, around the umbilical margin 

 white; interior pearly white. Alt. 12, diam. 16 mill. (Angas.) 



Port Darwin, N. Australia. 

 C. bicarinatas ANGAS, P. Z. S. 1880, p. 419, t. 40, f. 4. 



This shell is remarkable from its having too strong keels on the 

 last whorl, and also on account of its uniform dark brown color. 

 (Angas.) 



T. GRANOSUS Brazier. 



Shell conoid, spire prominent, apex white, smooth; whorls 4], 

 flattened, spirally encircled with four rows of beaded grains, the 

 two upper near the suture being the smallest, interstices with very 

 minute oblique striae, ornamented with white and light brown 

 flames ; suture deep, last whorl large and inflated, having rive 

 beaded rows of grains, the last being contiguous to the suture ; base 

 slightly convex, finely grained; aperture oblique, triangularly 

 ovate; peristome denticulated; columella white; umbilicus marginal 

 plicated and denticulated below. 



Alt. 6, diam. maj. 5J, min. 4J mill. (Brazier.} 



Barnard Is., JVo. Ill, N.-E. Australia. 



Clanculus granosus BRAZIER, Proc. Linn. Soc. N. S. Wales, ii, p. 

 43 (1878). 



Found in crevices of large blocks of coral. I cannot determine 

 the specific relationships of this unfigured Clanculus, as the descrip- 

 tion gives no details of the structure of the columella. 



T. RINGENS Menke. PL 11, figs. 49, 50. 



Shell perforate, conical ; whorls 7, the first smooth, yellowish, 

 following planulate, separated by canaliculate sutures, maculate with 

 chestnut and white, spirally cingulate above with 4 elegantly gran- 

 ulate ridges, the upper and lower the larger, last whorl acutely 

 carinated ; base slightly convex, ornamented with 8 to 9 granose 

 cinguli ; aperture rhomboidal, oblique r narrow ; basal margin sul- 

 cate-denticulate ; columella strong, oblique, terminating below in 

 A large tooth, ringent above ; columella callous, ringent, plicate. 



Alt. 10, diam. 11 mill. (Fischer.) 



S. Australia, Port. Lincoln; Van Diemen's Land. 



