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Show 1885.] FROM THE SOLOMON ISLANDS. 607 None of the specimens from the above localities are large, but are very variable in the style of their coloration, some from Ugi being precisely like N. pulchra of Sowerby, wrongly said to have been found at Panama. The operculum in all, however, is of the same slaty-black colour, with the pale spot at the nuclear end. The majority have the red stain on the columella more or less intense, but a few have the columella uniformly bluish-white. 61. NERITINA TURTONI, Recluz. Hab. From a stream, Shortland Island, and found " imbedded in a dark calcareous loam exposed in the banks of a large stream at Sulagina on the north coast of San Christoval" (Guppy); Guadalcanar Island, in streams (Macgillivray, in Brit. Mus.). The specimens from the Solomon Islands appear to be marked very much alike ; they are all coloured with oblique, fine, more or less undulating or zigzag black and yellow lines, of which the latter are invariably the finest and indeed hair-like. The largest specimens are those from Guadalcanar, measuring twenty-five millims. from the apex to lower margin of the aperture. The dead specimens from San Christoval retain the external polish and markings, although probably somewhat altered in tint; the black lines being of a dark slate-colour and the yellow lines white or lilac. The apertures and columella have lost all colour and are of a white chalky texture. In these specimens the columellar surface seems to be rather more convex than usual; but still I have no doubt they belong to this species. 62. NERITINA BREVISPINA, Lamarck. Hab. From streams in Shortland, Treasury, and Ugi Islands. The shells from the first and last of these localities closely resemble figures 24 a, b (N. subgranosa) in Reeve's monograph of this genus in the ' Conchologia Iconica.' Two specimens, however, are rather different, being smoother and very closely and finely lineated with black as in N. penicillata, Gould, which I regard as a variety of this species. The specimens from Treasury Island have the same kind of sculpture, but are entirely destitute of spines. 63. NERITINA SQUARROSA, Recluz. Hab. From streams in Treasury Island. This species has not been previously recorded from the Solomon Islands. The only specimen obtained is grey, faintly zoned with a darker tint, has many of the triangular warts whitish, and the collumella yellowish ; it is 27 millims. in diameter. 64. NERITINA SANGUISUGA, Reeve. Hab. Faro Island. •; This species may be the N. macrocephala ot Le GuilIon, as suggested bv Martens but it does not correspond in all respects with the original description in the 'Revue Zoologique' for 1841. The Solomon- Island specimens are only half the length of the specimen figured by |