finger-hinge, whole lower margin and greater part of the propod densely fringed with long slender setae mostly arranged in transverse tufts and rows; dactyl stout, its inner margin smooth, with a broad triangular process towards the subacute apex. Peraeopoda stout and broad and very densely setose, especially the fifth, posterior margin of basal joint regularly pectinate the pectinations longest towards proximal end.

In other characters closely resembling E. subcarinatus.

Female.—Fourth segment of pleon with single dorsal carina as in the male. First gnathopod similar to that of male, but with side-plate not appreciably produced anteriorly. Second gnathopod considerably larger than the first but similar in general shape, merus ending acutely, carpus about one-third as long as propod, which is only slightly broader than carpus, whole propod densely setose, the long setae being arranged in transverse tufts and rows, other long slender setae are present apparently similar to those found in the male, palm very oblique defined by one or two stout spinules and with a small spinose process near the finger-hinge; dactyl normal, its inner margin smooth and without protuberance, apex acute. Peraeopoda with posterior margin of basal joints simply serrate.

Colour whitish.

Length, up to 15 mm.

Distribution.—Blueskin Bay, Otago (G. M. Thomson); Moko Hinou (C. R. Gow). Probably widely distributed on New Zealand coasts.

Remarks.—The description of the second gnathopod of the female is taken from an ovigerous specimen. It is interesting to note that it shows more resemblance to the corresponding appendage in the male than is the case in E. subcarinatus. The special characters of the second gnathopods and the peraepods in the males are fully marked only in mature specimens; immature males are more like the females.