On Marine Polyzoa. 69 secondaries suffused with greyish fuliginous, with reddish-brown veins, fringe between the veins cream-coloured ; a few indistinct, confused, subraarginal whitish spots, similar to those on the external area of the primaries : thorax whitish at the sides, in front, and along the centre, with black tufts behind the tegulse ; abdomen with blackish sides (except upon the last two segments) and a dorsal longitudinal blackish stripe ; pectus black ; tarsi sandy whitish ; venter sandy yellowish. Wings below pale sandy brown ; the markings less distinct than above. Expanse of wings, <$ 4 inches 2 lines, ? 4 inches 6 lines. Darjiling (Lidderdale) . Type B. M. Hepialidae. 15. Hepialus marcidus, sp. n. Primaries above either pale buff or testaceous, mottled all over with greyish brown ; a broad interrupted central belt, spotted with little transverse dashes of the ground-colour, and with blackish spots across its centre, grey or greyish brown, sometimes becoming gravel-yellow upon the inner margin (where it is broken up into three or four unequal spots) ; a discal band, either grey or gravel-yellow, spotted in the centre with black; margin grey, sinuated internally : secon-daries semitransparent greyish brown : body dark greyish brown, with testaceous anus; thorax sometimes reddish. Under surface greyish, the markings obsolete. Expanse of wings, $ 1 inch 9 lines, ? 2 inches. Darjiling (Lidderdale). Type B. M. In the examples before me the more brightly coloured form is the male, the greyer form the female ; it is possible, how-ever, that much variation of tint may occur in individuals of both sexes. [To be continued. X. — Contributions towards a General History of the Marine Polyzoa. By the Rev. Thomas Hincks, B.A., F.R.S. [Plates IX., X., XI.] In the present and following papers I propose to describe and figure a large number of marine Polyzoa from various parts of the world which have hitherto, I believe, escaped notice, and thus to offer a contribution towards that general history of the class which still remains to be written. Et is by no
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