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Show 390 SIR C. ELIOT ON NUDIBRAXCnS [Mar. 1, armature is formed of two large strong triangular plates, almost united into a ring, dark brown, and formed of a mass of long hooks. The rhachis of the radula (PI. X X I V . fig. 1) bears lozenge-shaped thickenings, on each side of which are about 45 teeth. The number of transverse rows is about 70. The innermost teeth have a large denticle on the inner side, and three small ones on the outer; the rest are simply hamate, with 8-10 minute denticles ; the outermost irregular and denticulate on the apex in the younger rows, but in the older the denticulations seem to have been worn off. 5. CHROMODORIS SPLENDENS. Chromodoris splendens Eliot, Abstr. P. Z. S. 1904, No. 4, p. 15, March 8. [? =Chr. splendida Angas, Journal de Conch, i. 1864, p. 55.] Two specimens from Chuaka., East Coast of Zanzibar. The notes on the living animal are as follows:-" General colour somewhat miscellaneous, being produced by thick collections of purple and white dots, in different proportions in different places. A vivid orange border round the whole body. Underside milk-white. Mantle ample. Gill-pocket fairly large, gills purplish." The alcoholic specimens are of a uniform dirty yellow, and of about the same size. Length 40 mm., breadth 13, height 10. The free portion of the tail is 6 m m . long, but is entirely covered by the mantle, the free margin of which measures 7 m m . behind and 5 m m . at the sides and head. The rhinophores are large. The edge of the branchial opening is slightly raised. The total number of branchial plumes is 27, but of these three seem to be accessory ramifications and not independent branchiae. The circuit is open behind, and the two ends are turned inwards in a spiral. The anterior plumes are large, and those in the spiral very small, so that the living animal shows ten or twelve branchiae. The foot is rather wide, with thin margins, and is dilated and deeply grooved in front. The tentacles are distinct. The inconspicuous labial armature consists of two small yellowish plates, composed of fairly long bent rods, most but not all of which are bifid. The radula is also yellowish, with about 70 X 60.0.60 for formula. On the rhachis are indications of triangular thickenings, but the base of the triangle is not distinct. The innermost teeth bear three or four denticles on the inner and five on the outer side. The rest are hamate, rather erect, with six denticles under the hook decreasing in size downwards. The outermost show less difference from the rest than usual, and are long, erect, with about four denticles on or near the apex. I think it very probable that this is the animal described as Goniodoris splenclida in the ' Journal de Conchyliologie,' and I have indicated this probable identity in the name. The scheme of coloration is very similar, and the ample mantle, large rhinophores, and numerous branchiae are also points of resemblance, but the purple in the present specimen is distributed in the form |