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

MOLLUSCA. 489base are much deeper. The aperture is very narrow, the outerlip being thin and moderately sinuated above the angle. The spireis short, gradated, with rectilinear outlines. Length 24 millim.,diameter 12|,Providence Reef, Mascarenes, in 24 fms.I have named this species in honour of Prof. E. von Martens,from whose work on the Mollusca of the Mascarenes I have obtainedmuch information and assistance. It is distinguished by thenarrowness of the aperture, its somewhat pyriform shape, and theuniform orange tint of its colouring. The spire is paler, except atthe deepish suture, which is likewise orange.11. Conus articulatus. (Plate XLIV. fig. B.)Sotcerby, Proc. Zoul. Soc. 1873, p. 146, pi. xv. ^^. 3.Shellshortly fusiform, brownish pink, encircled near the middleof the body-whorl with a white zone interrupted with blotches of adeeper tint than the general ground-colour of the shell, everywhereornamented with transverse rows of minute reddish dots, which areinvisible to the naked eye. Spire white, terminating in a pinkapex, dotted with reddish brown upon the angle of the whorls, andblotched with the same colour upon their upper surface. Volutions9, slowly enlarging ; three apical smooth, glossy, convex ; the restin steps one above the other, sloping above, faintly grooved immediatelybeneath the suture, the furrow being broad, occupying halfthe upper surfacs of the whorls, but very shallow, not spirallystriated, exhibiting only fine arcuate lines of growth. The lastwhorl is acutely carinate above, very faintly convex at the sides,and contracted towards the front ; it is smooth at the upper half,and rather coarsely sulcated across beueath, a few of the interveningridges at the base and two passing through the subcentral whiteband being rather more distinctly dotted than the rest of the surface.Aperture narrow, and outer lip thin and slightly sinuatedbehind. Length 12 millim., diameter 6.Providence lleef, Mascarenes, in 24 fms.This species is represented in Weinkauff's monograph of thisgenus (Conch.-Cab. pi. .50. figs. 1 & 4) under the name of C. anabatram.C. anabatJirum of Crosse is, however, perfectly distinctfrom the species here described, but is regarded by myself as avariety of C. japonictts, Hwass.The locality " Mauritius " quoted by Weinkauff is confirmatory ofthe conclusion arrived at that his shell belongs to the same speciesas that from Providence Reef, and the figure, although representinga larger specimen, is fairly characteristic.12. Pleurotoma (Defrancia ?) grisea. (Plate XLIV. fig. C.)Shell very small, subfusiformly ovate, grey or dirty white, sometimesspotted with brown below the suture, or exhiliiting one ortwo pale or whitish spiral linos. Whorls 8 ; first 4-J white, smooth,