Genus Corophium, Latr.

(Cat. Amphip. Brit. Mus., p. 279.)

Corophium lendenfeldi, sp. nov. Pl. xx., fig. 1, a to e.

Eye rather large, elliptical, placed on a rounded lobe between the bases of the antennæ. Antennæ subequal; upper with basal joint large, stout, about twice as long as broad, second about two-thirds as long as the first and half as broad, third about two-thirds as long as the second and more slender, flagellum of about nine joints, nearly as long as the last two joints of the peduncle, a secondary appendage of two or three joints is also present; setæ very few and delicate. Inferior antennæ with the second joint short, produced inferiorly and anteriorly into a sharp point, third joint nearly as broad as long, fourth longer and stouter than the fifth; flagellum nearly as long as the last joint of peduncle, bearing below numerous stout setæ which become stouter and more curved towards the end. First gnathopod rather short and stout, ischios and meros short, the latter with a tuft of setæ towards distal end, carpus broader than the propodos and about two-thirds as long, thickly fringed with plumose setæ on inferior margin; propodos narrowing slightly distally, fringed on both sides with plumose setæ, dactylos long curved and acutely pointed, not impinging against the propodos. Second gnathopoda similar in form to the first, but longer and more slender, carpus considerably broader than the propodos and of the same length, bearing two longitudinal rows of sparsely plumose setæ which are as long as the joint itself; propodos narrow, tapering distally, fringed on both margins with long setæ, dactylos slender, not impinging against