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

;MOLLtrsCA. 65Cop])ii)ger at Port Jackson are like fig. 59 in the Conch. Icon. (C. carhonarium,Sow. non Phil.), but a little narrower, and those fromAVest Island in Torres Straits are of a peculiar short stuntedgrowth.3. O. patient, Bayle, = C. rugosum, Wood (non Lamarck), ofwhich species C. breve, Quoy and Gaimard, appears to be a variety,may be only a form of C. moras ; still there is a character aboutthe coarse ribbing and granulation and the blotchy irregularity ofthe painting which seems to demand their separation. Besides,M!M, Quoy and Gaimard state that the animals present certaindifferences.In conclusion, I should observe that the C.taherculdtum of Sowerby(Conch. Icon. figs. 21 a, b) is a peculiarly coloured specimen of thisspecies (C. patiens) ; also that the shell figured as G. bornii (Thes.fig. 175 ; Conch. Icon. fig. 26) is the true C. carbonariam of Philippi,fig. 59 of the Conch, Icon, not representing the latter species, butmerely, as already stated, a form of C. moras.C. tuherculatum, as defined by Lamarck and Kiener, is a commonRed-Sea species, which has been named C. cteruleum by Sowerby(Thes. Conch, vol. ii. p. 860, pi. 179. figs. 61, 62).67. Cerithium nigro-halteatum. (Plate V. fig. N.)Shell elongate, pyramidal, white, banded with brownish blackabove the suture, around the middle and base of the last whorl.Volutions about twelve, constricted above at the suture, longitudinallystrongly costate and spirally ridged and sulcated. The costceare prominent, about nine in number on the upper wliorls, somewhatinterrupted by the depression beneath the suture. The spiral ridgesare rather prominent upon the costae and unequal in thicknessthere are about four principal ones and several smaller interveningones. On the body-whorl (in the single specimen under examination)the costse are rather finer and about eleven in number—one, alittle stouter than the rest on the left side, extending to the baseand forming a lateral varix, the others becoming obsolete a littlebelow the middle, where the whorl is somewhat angnlated and concavebelow the angle. The transverse principal lira) number aboutsix, of which the two lowermost are granulous, white, and situatedbetween the dark base and the zone above the middle. The lowerpart of the whorl is finely concentrically striated and lirate. Aperturebroadly suboval, oblique. Basal canal short, oblique, slightlyrecurved. Columella obliquely arcuate, blackish. Labrum thickenedby the last costa, grooved and lirate within. Length 15 millim.,diameter 6.JIab. Prince of AYales Channel, 5-7 fms.This species is readily recognized by the peculiarity of its colours,the depth of the sabsutural dcpi'ession, and the concave base of thelast whorl.