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Show 254 SIR CHARLES ELIOT ON NUDIBRANCHS [Mar. 17, the cerata begin further back and are set in groups. (2) In B. mcebii the reproductive orilice is under the third row of cerata, and the vent between the sixth and seventh rows, almost dorsal : in Ji. major the reproductive orifice is under the first group of cerata, and the lateral vent after the second. (3) In B. major the basal part of the teeth is proportionally narrower than in B. mcebii, and the denticles are more irregular. Var. ORNATA. One specimen captured at Chuaka, May 1902, seemed to be a typical Bceoliclia major, except for a somewhat more ornate coloration. The ground-colour was of a yellowish-white with a yellowish-brown pattern, consisting of a series of irregularly shaped lozenges containing white spots, down the middle of the back as in B. major. The oral tentacles were white with green stripes. The cerata were white with yellow tips, below which was a bright blue band. C e r b er il l a a f r ic a n a , n. sp. (Bergh, Journ. Mus. Godef. Heft ii. 1873, & Heft vi. 1874; Beitr. zur Kenntniss der Aeolidiaden, Theil ii.; temper's Reisen im Arch. Philipp., Malac. Untersuch. iii. p. 879.) One specimen from the reef Jembiani, Zanzibar, 3'5centim. long and 13 broad in life. The back was almost entirely covered with cerata, so that the body-colour was hardly visible. Most of the cerata were very dark green with a bright yellow r ing, but the innermost were white with bluish tips, with ordy a ring of dark green. The oral tentacles were dark blue, with green bases. The rhinoplrores had four bands of colour-, which were, starting from the base, greenish brown, white, blue, white. On the head were two yellow lines, extending from the oral tentacles to the rliino-phores, and the margins of the head and foot were also of a bright light yellow. The animal was stoutly built. The foot projected considerably beyond the body on either side. Its anterior arrgles were expanded into long tentacular processes. The head had also two lateral expansions, from which projected at right angles the very large and conspicuous oral tentacles. In life the rhinophores were quite simple and fairly long. In the alcoholic specimen they were contracted and somewhat wrinkled. The numer ous and thick-set cerata were disposed on peduncles. There was a bare triangular* patch behind the rhinophore, and a narrow bare space down the middle of the back, but the cerata folded over the latter so that neither it nor the transverse bare areas were visible. There were about twenty transverse rows of cerata. The first row at the side of the rhinophores consisted of about 10 cerata, much smaller than the rest. After the third row was a distinct gap, and a smaller gap after the fourth. After that the rows were so close together that they could not be distirrguished superficially. The innermost cerata were larger than the others, and sometimes bifid : small cerata extended almost to the end of the very short tail. |