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Show 1903.] FROM EAST AFRICA AND ZANZIBAR. 377 21. PLATYDORIS ELLIOTI (?) (A. & H.). [Alder &, Hancock, " Notes on a Coll. of Nud. Moll, made in India," Tr. Z. S. iii. 1864, p. 116.] One specimen from Wasin, dredged in 10 fathoms. The notes on the living animal describe the dorsal surface as being on the whole of a reddish brown, very beautifully mottled with various shades of sandy colour, the visceral mass being darker than the rest. The under surface was white : just outside the edge of the foot was a row of dark brown spots, and nearer the mantle-edge a bright orange border formed of spots set near together. The alcoholic specimen measures 6-4 centimetres in length, 4-4 in breadth, and 2-4 in height. Like PI. scabra, it is hard and rough. The colour is a mottled pattern of white, a sandy tint, and reddish brown. Beneath, the sides of the foot and the adjacent parts of the broad mantle, which is 2-2 centimetres wide, are thickly spotted with chocolate marks arranged so as to give the impression of a continuous band. Seventeen chocolate spots are irregularly arranged round the foot on a yellowish ground ; then comes a fainter band also composed of chocolate spots ; then a yellowish border extending to the mantle-edge. The foot is long and narrow, grooved and notched in front but not deeply. The rhinophore-pockets are closed by six projections. The branchial opening is also six-lobed, the anterior and posterior lobes being larger than the others, as in PI. eurychlamys and scabra. The branchiae are six, tripinnate, not very large. The oral tentacles are much retracted, white and conical. The buccal mass is large and muscular, the labial cuticle very strong but unarmed. The radula about 40 x 70.0.70 ; the teeth yellowish, simply hamate, the outermost smaller but not much degraded. The stomach is large and free, strongly laminated in parts ; it appeared to contain sand, as well as alimentary matter. The penis is armed with two rows of hook-bearing scales of the usual type, but set very close together, each fitting into the next; the vagina with lumps but no scales. I feel somewhat doubtful whether this animal should be called PI. ellioti. Neither m y specimen nor those described by A. & H. present any very definitely distinguishing characters. But, on the other hand, there is no feature of importance which militates against the identification, and the colours (which A. & H. record as varying) are sufficiently alike. 22. PLATYDORIS PULCRA, sp. n. Two specimens from the neighbourhood of Wasin, dredged in 10 fathoms. The living animal was of a beautiful orange-red, covered closely with minute lighter spots. Round the mantle was a border of dull white containing purplish-black spots and small specks in one specimen, and in the other dull violet spots. The under surface is described in the notes on living specimens as of uniform lighter orange, but in the alcoholic specimens there is a rim of faint |