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Show 1887.] MOLLUSKS OF THE VITI ISLANDS. 301 I have been enabled to examine typical specimens of T. cerea and I. nitida labelled in Gassies's own handwriting, and do not hesitate to refer the former to the smooth crenulated and the latter to the smooth non-crenulated varieties of T. ceylanica. 4. TRUNCATELLA GRANUM, Garrett. Truncatella granum, Garrett, Amer. Journ. Conch. 1872, p. 225 ; Schmeltz, Cat. Mus. Godeff. v. p. 105; Pfeiffer, Mon. Pneum. iv. p. 16. This small species occurred to m y notice in one locality only, the N.E. end of Taviuni, where it was found abundant beneath loose stones a little below high-water mark. Its small size (4| to 5 millim. long), uniform cinereous colour, 4| persistent whorls, 20 to 25 riblets on the body-whorl, small ovate aperture, and conspicuous duplicated peristome will distinguish it from the preceding species. 5. TRUNCATELLA AVENACEA, sp. nov. Shell small, rimate, cylindrical, corneous ; ribs rather small, erect, rounded, about the same width as their interspaces, 35 to 40 on the last whorl; suture impressed ; whorls persistent, 4\, convex ; base distinctly carinated ; aperture small, vertical, oval, a little less than a fourth the length of the shell; peristome continuous, obtuse, slightly expanded, and duplicated by the continuation of the basal keel. Length 6, diam. 2g millim. A iew examples found associated with T. vitiana at Vanua Levu. It more nearly resembles the strongly ribbed T. semicostata than any other species inhabiting the group ; but may be distinguished from that species by its more numerous ribs, more convex whorls, smaller aperture, and more conspicuous basal keel and duplicated peristome. Genus TAHEITIA, H. & A. Adams. 1. T A H E I T I A F U N I C U L U S (Mousson). Truncatella funiculus, Mousson, Journ. de Conch. 1870, p. 171 ; Paetel, Cat. Conch, p. 117; Pfeiffer, Mon. Pneum. iv. p. 21. This species was discovered by Dr. Graffe in the interior of Viti Levu. It is a slender, cylindrical, whitish horn-coloured species, with 6 persistent convex whorls and a deep suture ; the ribs are sharp, rather remote, 12 to 16 in the body-whorl, all converging at the base. The aperture is small, vertical, semicircular. Peristome obtuse, expanded, continuous, and slightly porrected. Length 8, diam. 2 millim. 2. TAHEITIA TURRICULA (Mousson). Truncatella turricula, Mousson, Journ. de Conch. 1870, p. 196; Paetel, Cat. Conch, p. 117 ; Schmeltz, Cat. Mus. Godeff. v. p. 104 ; Pfeiffer, Mon. Pneum. iv. p. 20. Inhabits Mango Island, where it was discovered by Dr. Graffe. I do not know this species. PROC. ZOOL. Soc-1887, No. XXI. 21 |
