Animal unknown.

New Zealand, Tolaga Bay. Attached to a living Palinurus.

I have given the above brief character from the plate, and imperfect description in the voyage of the Astrolabe. The small and distinctly tubular orifice, and the smooth carinated edge of the globose capitulum, appear sufficiently to distinguish this species from A. cornuta. The colour is stated to have been white with violet tints. Length, two (French) lines.

Anelasma. Gen. Nov. [Pl. IV.]

Alepas. Lovén. Ofversigt of Kongl. Vetenskaps-Akad. Fördhandlinger: Forsta Argangen. Stockholm, 1844, p. 192, Tab. 3.

Capitulum sine valvis: aperturâ amplâ: pedunculus fimbriatus, sub-globosus, infossus.

Capitulum without valves; aperture large; peduncle fimbriated, sub-globular, imbedded.

Cirri without spines; outer maxillæ and palpi rudimentary, spineless; mandibles minute, with several small teeth irregularly placed; maxillæ minute, with very minute irregularly scattered spines. No caudal appendages.

I owe to the great kindness of Professor Steenstrup, an examination of this very curious cirripede, well described and figured by Lovén, who considered it an Alepas. It lives parasitic, with its peduncle imbedded in the skin of sharks, in the North Sea. According to the principles of classification which I have followed, this cirripede cannot possibly remain in Alepas, and must form a new genus; for some time, indeed, I thought that a new family or sub-family ought to have been instituted for its reception; but when I considered that its highly peculiar characters are all negative, as the non-articular, non-spinose structure of the cirri, and that no new or greatly modified functional organ is present, I concluded that it might properly remain amongst the Lepadidæ. We shall, moreover, hereafter see that the male of Ibla, which, of course, must remain in the same family with the female, is, in some analogous respects, even more abnormal than Anelasma.