182 Proceedings of the Royal Society of Victoria. 



Calliostoma hedleyi, sp. nov. (PI. IX., Fig. 4). 



Shell conical, imperforate, apex acute. Whorls eight, convex,, 

 often tumid below the suture on the lower whorls, suture well- 

 defined. Embryonic whorl smooth, the sculpture on the two 

 following whorls is clathrate, and on the remainder consists of 

 spiral, irregularly granular threads, of unequal size, and varying 

 in number, usually six on the antepenultimate, and by the 

 gradual division of some of them, increasing to eight on the pen- 

 ultimate whorl, and twelve on the body whorl above the peri- 

 phery at the outer lip, and there are from twelve to sixteen on 

 the base, these latter are often spotted with red on alternate 

 threads, granulations on base flattened, space between threads 

 narrow. 



Base convex, umbilical region narrowly impressed. Aperture 

 subrhomboidal. Outer lip thin, smooth inside. Inner lip, pillar 

 oblique, smooth, rounded, somewhat excavately flattened at its 

 base from within, not toothed. 



Colour, yellowish-brown, with reddish markings, either in 

 maculations or spots. 



Dimensions of Type. — Diameter, 14 mm., height, 15 mm., other 

 specimens measuring, 14 by 17 mm., and 14 by 12 mm. 



Locality. — Dredged 5 to 7 fathoms off Rhyll, Phillip Island, 

 Western Port (GatlifF) ; San Remo, Puebla Coast, Airey's Inlet, 

 Lome, Portland (Maplestone). 



Observations. — As in many other Trochids the sculpture in 

 this species varies considerably. By Australian conchologists it 

 has generally been wrongfully identified as Trochus fragum, 

 Phillipi, but reference to the original description and figure show 

 that species to be a more acutely conical shell, with flatter 

 whorls and larger granules. We agree with Mr. C. Hedley in 

 his remaiks at page 19 Proc. Lin. Soc. N. S.Wales, 1901, that 

 T. fragum is a synonym of T. decoratus of the same author, the 

 latter name having priority. Hitherto we have not found this 

 species on our coast. 



We have named the shell after Mr. C. Hedley, Conchologist 

 to the Australian Museum, Sydney, as it is greatly owing to his 

 critical remarks above referred to that we have been prevented 

 from following the errors of others. 



Type in Mr. Gatlift"'s collection. 



