434 FUNAFUTI ATOLL. 



weaker one half a -whorl back, none else appear. Aperture per- 

 pendicular, oval. Outer lip smooth within, sharp edged, crenulate 

 outside, inner lip excavate, thickly lined with callus, with a 

 posterior nodule at the margin of the channelled angle. Length 

 7, breadth 3 mm. 



A single specimen from the lagoon beach. 



This species seems related to C. maculosum, Mighels ; it is far 

 more slender, and differs in that the revolving line of tubercles 

 fails to attain the last whorl. j 



OERITHIUM VARIEGATUM, Quoy & Gaimard. 

 Tryon, loc. cit., p. 134, pi. xxiv., figs. 41, 43, 45, 65, 66. 



Some imperfect examples collected by Mr. Sweet are with 

 hesitation so determined. 



CERITHIUM ZEBRUM, Kiener. 

 Tryon, loc. cit., p. 137, pi. xxv., figs. 71, 72. 



I refer to this species a small shell abundant on the lagoon beach, 

 7 mm. long, variously coloured brown, cream, mauve and salmon, 

 unbanded and banded. No really satisfactory figure or description 

 of it exists, the earliest is much the best. Melvill and Standen, who 

 recognise it from the Loyalties, erroneously state that it was origin- 

 ally described from the Galapagos, whence Sowerby reported it. 

 The locality given by Kiener himself* is Mauritius. Tryon adds 

 Samoa. I found it in Port Moresby, British New Guinea and at 

 Oubatche, New Caledonia. It is represented in this Museum 

 from the New Hebrides. So widespread and variable a species 

 probably possesses a synonomy to match. I agree with Langkavel'sf 

 remark that C. ianthinum of Gould, should be here included, 

 which would extend the geographical range of the species to 

 Tahiti and the Paumotus. It is likely that C. unilineatum, Pease 

 and C. dichroum, Melvill and Standen should be reduced to C. 

 zebrum. Pease adds C. aspersum, Deshayes as a synonym. J 



CERITHIUM IMPENDENS, sp. nov. 



(Fig. 23). 



Shell strong, stout, regularly conical, each of the upper whorls 

 overhanging the next, bi-angled above the suture, heavily 

 variced on the back of the last whorl. Colour upon a 

 white ground is painted ochre-yellow, in one instance chocolate, 

 which chiefly prevails on the base and between the ribs, thus 

 accentuating the projections to the eye. Whorls eight, suture 

 deeply impressed. Sculpture peculiar buttress ribs ornament the 



* Kiener Coquilles Vivantes, Canaliferes i., (n.d.), p, 72. 

 t Langkavel Donum Bisinarckianura, 1871, p. 25. 

 j Pease Am. Journ. Conch, vii., 1872, p. 75. 



