THE MOLLUSCA HEDLEY. 443 



tapering to a slender point, the lower swollen to bulbous. Colour, 

 which alters in drying, reddish purple to lilac, the apex and the 

 lower row of gemmules usually cream. Whorls about eighteen. 

 Gemmules subcircular, polished bosses, shelved above, separated 

 by about half their own diameter, in two rows of about twenty- 

 two in a whorl, alternating vertically ; the interspaces between 

 the gemmules are spirally wrinkled. On the antipenultimate 

 whorl a spiral thread arises between the two rows of gemmules, 

 but following the sinuations of the upper, this gradually in- 

 creases, becomes segmented, and on the last whorl forms an 

 additional row of gemmules. Just behind the aperture extra 

 rows are also intercalated. The protoconch is acicular, four or 

 five whorled, the whorls bicarinate, crossed obliquely by numerous 

 fine bars, which bead the carinae. The aperture is perpendicular, 

 almost square, lip reflected, the right margin crossing the canal 

 in a spur, the canal being closed by its anterior wall folded over, 

 but not touching the pillar. Anal notch deep, a subcircular, 

 subtubular, orifice in the place of the last sutural gemmule ; 

 onwards from the last actual gemmule the lip is free from the 

 body whorl. Length 7| mm. 



Common in shallow water in the lagoon of Funafuti. As the 

 rare T. violaceus has been generally confounded with the com- 

 mon T. ruber, whose aperture is quite different, most literary 

 records are untrustworthy, and I forbear to quote them. I have 

 myself collected the species at Port Moresby and Milne Bay, British 

 New Guinea, and at Oubatche and Noumea, New Caledonia. 

 Specimens of T. ducosensis, Jousseaume, received from Noumea, 

 from Mr. R. C. Rossiter, belong to the pale form of T. ruber. 



TRIFORIS CLIO, sp. nov. 



(Fig. 30). 



Shell rather small and slender. Colour cinnamon-brown, lowest 

 row of gemmules and extremity of canal white, other gemmules 

 pale brown. Whorls fifteen. Protoconch five whorled ; first two 

 together swollen and subglobose, shagreened, remainder bicarinate 

 by a median furrow and crossed by numerous fine bars which 

 bead the carinse. The adult whorls are beset by first two, then 

 three, and finally four spiral rows of gemmules, eighteen to a 

 whorl, set vertically, gemmule above gemmule, up the spire. Broad 

 furrows ascend vertically from whorl to whorl, deeper than the 

 spiral interspaces which part row from row. The gemmules are 

 lozenge shaped, polished, standing half their length apart and 

 linked to their neighbours in a row by a coloured band smoother 

 and shallower than the remainder of the vertical furrow, of which 

 it forms a part. Between the gemmules the surface is roughened 

 by close fine spiral hair lines. Two unbeaded cords run round 

 the base. Aperture nearly vertical, outer lip bending round a 



