Report on the zoological collections made in the Indo-Pacific Ocean ...

MOLLUSC A. 73granules alternating with others very much finer, having smallerand subobsolete tubercles. The aperture is obliquely subqnadrate.Columella a little arcuate at the upper part, white, retloxcd overthe white umbilical region and subtrnncate anteriorly. Height12 millim., diam. Dg ; another specimen is 13 high, and 12 inwidth.Hah. Prince of Wales Channel, Torres Straits.There are two varieties of this pretty species, which may betermed the green and pink. The foimer is represented by fourspecimens in the Museum (three belonging to the Cumingian collection)and the latter by two, which fact, however, can hardly boaccepted as indicating the relative abundance of the two forms.In the green variety the base in three out of the four examples issomewhat pinkish, radiatcly streaked with white, whilst in thefourth specimen it is green with irregular strcalss and has a moretessellated aspect. The perforation is small, and may either be concealedby a thin callosity or remain open.This is a smaller species than T. fra[/u7n (Phil.), has more numerousgranules (of which there are. Jive instead of four rows, besidesthe basal girdle), and intervening fine lira; are generally to be metwith on the spire, which are wanting in Philippi's shell. I shouldalso observe that the columella of T. fragum, judging from thefigure, is less incurved than in this form.93. Trochus (Monilea) lifuana. (Plate VI. figs. B, B 1.)Fischer, Journ. de Con. 1878, vol. xxvi. p. G3.]\Iouilea lifuana, Fischer, I. c. 1879, vol. xxvii. p. 30, pi. 3. fig. 5.Trochus lifuauus, Fischer in Kiener^s Coq. Viv. p. 3S8, pi. IIG.fig. 4.Shell suborbicular, only slightly elevated, moderately thick, narrowlyumbilicated, spirally lirate and striated throughout, andmarked with rather distinct lines of growth, pinkish white, variedwith large brownish blotches and transverse lines articulated withwhite and dark purplish brown. Whorls 5^-6, convex, separatedbj' a deepish suture. Last whorl compressed, convex and concentricallystriated beneath, obtusely subangled at the periphery. Spirenot much elevated, having slightly convex outlines. Umbilicusnarrow, perforate to the apex, margined with a thickened spiralwhite or spotted callus and furnished with a second more elevatedone within, which termimites on the columella in a lateral j'ellowishprojection. Aperture quadrat ely subcircular, oblique, only thinlynacreous within. Columella oblique, arcuate, thickened by the endsof the two spiral callosities of the umbilicus and slightly reflcxed.Outer lip (viewed laterally) obliquely excurved above the peripheryand broadly siniiated beneath. Height 6| millim. ;greatest diameter9, smallest 7|.Hctb. Prince of Wales Channel, Torres Straits, 7 fms.The colouring in the two specimens from this locality is verysimilar, differing only in the amount and size of the blotches, which