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Show 1877.] ANTHOBRANCHIATE NUDIBRANCHIATE MOLLUSCA. 237 9. GONIODORIS ? VERRUCOSA1. G. verrucosa, Crosse, Journ. de Couch, xii. p. 56, pl. 5. f. 4 (1864). Chromodoris verrucosa, Bergh. Hab. Port Jackson. Gen. AETHEDORIS. Alder & Hancock figure in vol. 5 of the Zoological Society's 'Transactions,' a form belonging to a new genus " apparently related to Goniodoris." As no specimen came into their hands, they could give no description. The most striking characteristic, seen in the drawing, is the expansion of the bilobed head, each lobe being semi-crescentic, with the apex curving backwards and the margin bearing 12 to 14 conical dentations. A. INDICA. Figured, Alder & Hanc. Trans/Zool. Soc. v. pl. 33-. f. 20 (1864). Hab. Madras coast. Gen. IDALIA, Leuckart (1828). Euplocamus, Philippi (1836, part of). Body convex, smooth. Mantle indistinct, the margin bearing filaments, generally longest in front. The head is produced anteriorly. Rhinophores linear, laminated. Branchiae simply pinnate, non-retractile. Odontophore with 4 spines in each tranvserse row, the two middle ones large, no central spines. A spinous buccal collar. Messrs. Alder & Hancock have thus divided the species :- a. Centre of back with filaments, fnner lingual spines falcate and nearly smooth ; external spines short. Spinous collar complete. 1. I. E L E G A N S , Leuck. Brev. An. quor. Descr. p. 15, f. 2 (1828). /. laciniosa, Phil. Euplocamus laciniosus, id. Hab. Mediterranean ; coast of France and Channel Islands. 2. I. LEACHII, Aid. & Hanc, figured Mon. pl. 27. J. elegans, Alder, Trans. Tynes. Club, i. p. 112 (1848). Hab. British coasts. 3. I. CIRRIGERA, Phil. En. Moll. Sic. ii. p. 77, t. xix. f. 4 (1844). Hab. Sicilian shores. 4. I. TENTACULATA, Stimps. Proc. Ac. Nat. Sc. Phil. vii. p. 379 (1855). Hab. China. 1 The figure seems to show that the rhinophores are retractile; if so the animal cannot be a Goniodoris; there is no means of judging as to the retractility oi the branchia?, which are "voluminous and ramifying " and therefore probably not belonging to Chromodoris. The elongated tubercles covering the body and the sober coloration are also not characteristics of a Chromodoris. |