120 Proceedings of the Royal Society of Victoria. 



82. Gibbula sequisulcata, T. Woods. 

 G. (upnsulcata, T. Woods, P.R.S.Tas., 1876, p. 98. 



83. Calliostoma tasmanica, R. M. Johnston. 

 Zizyphinus tasnianicus, R. M. Johnston, P.R.S.Tas., 1879, p. 38. 



84. Calliostoma latecarina, sp. nov. Plate III., 

 figs. 10 and 11. 



Shell small, trochiform, moderately thick, naci-eous internally, 

 strongly keeled at the periphery of the body-whorl, with a convex 

 base below. Apical angle about sixty degrees. Apex small and 

 somewhat obtuse, consisting of about one-and-a-half smooth, 

 convex, embryonic whorls, the tip of which is central. The 

 remainder of the shell consists of four somewhat flat to slightly 

 convex and distinctly-shouldered whorls, the shouldering, owing 

 to a marked flattening of the posterior slope in the neighbourhood 

 of the suture, giving rise to the somewhat step-like appearance of 

 the spire. The slope from the shoulder to the antei'ior suture on 

 the spire-whorls usually only very slightly convex ; on the body- 

 whorl convex to the strong keel, which runs out towards the 

 lower part of the outer lip. Below the keel the base is convex 

 to the aperture. Aperture quadrate, outer lip broken but pro- 

 bably thin at its outer edge ; inner lip iiacreous, moderately 

 thick, and reflected at the anterior end. Postei'ior slope between 

 the shoulder and suture carries three fine spiral threads, the flat 

 shallow interspaces between being about twice the width of the 

 threads, and bearing about three much finer and just discernible 

 spiral threads. Below the shoulder the interspaces become 

 narrow and shallow spii'al grooves, and the threads become broad 

 and flat, about five or six of these strong threads on the spire- 

 whorls, but on the body-whorl about three finer threads of the 

 same character are noticeable on either side of the six stouter 

 threads. By far the stoutest spiral band on the body-whorl is 

 the keel, below which, that is on the base, there are eight or nine 

 shallow spiral grooves, with broad flat ridges between, the latter 

 tending to be subdivided into two anteriorly by the development 

 of a finer fjroove alon^jc their middle. 



