MONILEA-MIXOLIA. 263 



M. PRODICTA Fischer. PI. 41, fig. 25. 



Shell small, broadly umbilicated, thin, orbicularly depressed ; 

 whorls 6, the first whitish, shining, the following ornamented with 

 dots of pale chestnut and tawny, separated by linear sutures, terraced 

 above, planulate, carinate, spirally delicately striate ; last whorl 

 dilated, acutely bicarinated, convex beneath, shining, cingulate with 

 articulated lines, with fine radiating and concentric striae ; aperture 

 quadrate, margins acute ; columella almost vertical, a trifle reflexed 

 above ; umbilical area buff, more prominently striate. 



Alt. 4, diam. 7 mill. (Fischer.) 



Port Jackson; N. S. Wales, Australia. 



Margarita angulata A. ADAMS, P. Z. S. 1851, p. 190. Minolia 

 angulata ANGAS, P. Z. S. 1867, p. 217. T. prodictus FISCHER, Coq. 

 Viv., p. 395, t. 118, f. 1. WATSON, Challenger Gasteropoda, p. 72. 



Angulata is several times preoccupied as a specific name in Trochus 

 but not in Minolia nor Monilea ; the orginal description by Adams 

 being wholly insufficient for identification, I prefer to adopt Dr. 

 Fischer's name. 



M. TASMAXICA Tenison- Woods. PL 61, figs. 38, 39, 40. 



Shell broadly umbilicate, depressed, with low-conoidal spire, thin, 

 scarcely shining, opaque whitish, upper surface W 7 ith radiating 

 maculations of purplish or olive-brown, base marbled with the same 

 colors ; apex acute minute ; sutures well impressed ; whorls about 5?, 

 convex, those of the spire subangular in the middle, flattened below 

 the suture, giving the spire a terraced appearance, last whorl sub- 

 cylindrical, obtusely subangular at the periphery, convex beneath ; 

 surface all over encircled by delicate spiral elevated stride, and 

 around the umbilicus decussated by growth lines; aperture sub-, 

 circular, a trifle modified by the contact of the penultimate whorl ; 

 margins all thin, simple ; umbilicus about J the diameter of base, 

 opaque white within, and longitudinally striated. 



Alt. 4?, diam. 6 mill. 



Bass' Straits and Long Bay, Tasmania. 



Margarita (Minolia} tasmanica TEX. WOODS, Proc. Hoy. Soc. 

 Tasm. 1876, p. 143 (1877). 



Tenispn- Woods gives alt. 5, diam. 9 mill, for the dimensions of this 

 species. The tubular whorls, rounded save for a flattened area be- 

 low the suture, and keel-less except for the carina banding that area, 

 will discriminate this shell from many species ; other marks are the 



