CALLIOSTOMA. 359 



C. RUBROPUNCTATUM A. Adaiiis. PI. 66, fig. 30. 



Shell small, orbiculate-coiiic, buffish; ornamented with transverse 

 spiniilose cinguli (4 on the last whorl), interstices clathrate, beauti- 

 fully dotted with red. (Ad.) 



Albany Id., N. Australia, 3-4 fnis. ; Port Darwin, N. W. Australia, 

 8-12 fms. 



Z. rubropundatus Ac, P. Z. S. 1851, p. 167. — Rkeve, Conch. 

 Icon., f. 56. — Tr. (Calliostoma) rubropundatus Ad., Smith, Zool. 

 Coll. H. M. S. ' Alert,' p. 72. 



Smith (loc. cit.) writes as follows : This is a charming little 

 species, and readily recognized by its peculiar painting and remark- 

 able sculpture. Adams describes the color as "lutescens." I should 

 rather consider it pale fleshy pink, with dark red dots in the inter- 

 stices between the oblique ccstse and the transverse or spiral ridges. 

 The latter are said to be four in number on the last whorl ; but on 

 careful examination I find six, of which four are, however, more 

 prominent than the rest. The upper volutions are encircled by three 

 principal lira?, and a fourth secondary one at the suture. The points 

 of intersection of these spiral ridges and the oblique costse are 

 produced into quite acute nodules or prickles. The base of the shell 

 is almost flat, ornamented with about six concentric lirse, which are 

 more or less granulous, with the interstices exhibiting strong lines of 

 growth and translucent nacre. The color closely approaches the 

 rest of the surface, varied with brown dots both upon and between 

 the granules. 



C. VENUSTUM Dunker. PI. 67, fig. 72. 



Shell of an elevated-conical form, narrow and slender, the lateral 

 outlines of spire straight, the base convex, imperforate. It is strong, 

 solid ; ground color either olive-green or dark red, with narrow 

 longitudinal stripes of white, the periphery of the last whorl some- 

 times articulated with white, and the base either unicolored dark, or 

 finely dotted with white. Whorls 10, the apical one or two convex, 

 smooth, the followdng flat, finely spirally striate (about 14 stride on 

 the penult, whorl of a large specimen), the last whorl convex at the 

 periphery, angulated there in specimens not completely adult, convex 

 beneath, with 10-12 concentric lirulse thei'e. The entire surface has 

 fine lines of growth ; there is sometimes a slight tendency toward 

 plication on the periphery of the last whorl. Aperture qutidrangular, 

 oblique, smooth inside ; basal lip thickened by a straight callous 



