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Show 392 SIR C. ELIOT ox XUDIBRAXCHS [Mar. 1, 7. CHROMODORIS VICINA. Chromodoris vicina Eliot, Abstr. P.Z.S. 1904, No. 4, p. 15, March 8. Twelve specimens from Chuaka. The following notes were made on the living animal:- " Mantle and foot bordered with light violet, the latter border a row of dots. Middle of back drab-brown with bright violet spots, the larger ones with a white centre. Near the edge of the mantle a number of yellow spots with white borders, which are often confluent. The foot deep and narrow, white with some yellow spots, near the lower edge. The rhinophores dark brown with white tips. Each of the branchiae bore two black bands." The alcoholic specimens are of a dull reddish brown and present two very different forms : one long and narrow, measuring 37 m m. in length and 9 m m . in breadth, and the other oval, being 27 m m. long and 20 broad. Both are about 20 mm. high. The margin of the mantle is about 6 m m . wide, and forms a sort of hood over the head. The branchial opening is very small. Both it and the rhinophore openings are slightly raised. The branchiae are 16 in number, the circuit is open behind, and the row of plumes turns inwards in a small spiral. The foot is long and narrow. In the long form of the animal it projects about 5 m m . beyond the mantle ; in the broad form it is covered by it. The anterior margin is rounded and grooved, but not notched. On each side of the mouth is a small conical tentacle. The labial armature consists of two yellowish plates composed of rather long rods, bifid at the tip and generally bent into the form of hooks, but sometimes straight. These are much like the same organs in Chr. striatella (vide Bergh, ' Challenger' Reports). The formula of the radula is about 50x45.0.45. The rhachis is bare but exhibits in places a slight wavy fold. The innermost teeth bear three denticles on each side of the central cusp. The next two or three are of much the same shape, but denticulate only on the outer side. The majority are tall and straight, bearing five large and distinct denticles under the terminal book, and sometimes two or three small irregular denticles in addition. The five or six outermost are irregular in shape, and bear from three to six irregular denticulations mostly on the apex. This species is closely allied to Chr. tryoni, and will not improbably prove to be a mere variety of it. All the present specimens, however, have a somewhat different coloration, fewer branchiae, and more numerous denticles on the teeth. 8. CHROMODORIS ELIZABETHINAB., var. AFRICANA. (Plate XXIV. fig. 4.) Two specimens from the East Coast of Zanzibar. The notes on the living animal describe the dorsal surface as black and white, black preponderating. The mantle had a double border, yellow' |