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Show 1885.] FROM THE SOLOMON ISLANDS. 591 7. H E L I X (GEOTROCHUS) GAMELIA, Angas. Hab. Shortland and Treasury Islands in the straits between Bougainville and Choiseul Islands (Guppy) ; Stephen and Ysabel Islands (Angas). 8. HELIX (GEOTROCHUS) HARGREAVESI, Angas. Hab. Faro Island, also between Bougainville and Choiseul Islands. Found in the higher parts of the island up to the summit, 1900 feet above the sea. This and the preceding species are very closely related, the colour and disposition of the bands being almost the same. H. hargreavesi may, however, be recognized by its more elevated conical form, the much broader band on the base of the body-whorl, the blackish-brown peristome, the dark-coloured callosity overspreading the umbilical region, and the peculiar oblique columellar margin, wdiich is thickened and almost subtruncate anteriorly where it falls within the outer edge of the lip, which is fused above with the spreading umbilical callus. In H. gamelia the last whorl does not descend in front, whereas in the present species it takes a rather sudden and considerable turn downwards. 9. HELIX (GEOTROCHUS) MENDANA, Angas. Hab. Shortland Island, Bougainville Straits. In the Proc. Zool. Soc. 1867, p. 889, Angas gave Ysabel Island as the locality of this species, but he subsequently presented two specimens to the British Museum from Bougainville Island. 10. HELIX (GEOTROCHUS) MOTACILLA, Pfeiffer. Hab. Simbo Island, south of Choiseul Island. Eddystone Island, where this species was originally discovered, also belongs to the Solomon, and not to the Admiralty group as stated by Pfeiffer. The specimens brought home by Mr. Guppy belong to the variety ornamented with four spiral bands upon the body-whorl, two above and two below the middle, of which the two nearest the somewhat carinate periphery appear to be invariably of a darker tint than the rest. 11. HELIX (GEOTROCHUS) GUPPYI. (Plate XXXVI. fig. 4.) Shell elevately conical, thin, pale yellow, ornamented with conspicuous nearly black or black-brown spiral bands, one above and one below the sutures of the upper whorls, and three upon the last, one sutural, the second peripheral, and the third basal. Volutions 6 rather slowly enlarging, a little convex, sculptured with fine oblique striae of growth, not glossy. Three first whorls livid purplish, the last rather sharply angled at the middle, not descending in front, having the basal band broad around the almost concealed perforation, and obsolete within the aperture. The latter is oblique, somewhat narrowed and pouting in front, banded within with three almost black and two white bands, the central one of the former being squarely truncate at the end, only the lower corner of it |