Eurystheus dentatus (Chevreux).

Gammaropsis dentata Chevreux, 1900, p. 93, pl. 12, fig. 1. Eurystheus afer Chilton, 1912, p. 510, pl. ii, figs. 30–34.

I have a few specimens of Eurystheus that I have had some difficulty in identifying. I find, however, in the better-developed specimens that the lower margin of the first side plate is distinctly dentate, as described and figured by Chevreux for the species named above, and the general agreement in other characters shows that they must be referred to that species. In the New Zealand specimens, both in the male and the female, the gnathopoda are more elongated and slender than those figured by Chevreux, but in others from the Kermadec Islands which seem to be otherwise the same the gnathopoda are stouter and like those of Chevreux' specimens. The New Zealand specimens are certainly the same as those from Gough Island collected by the “Scotia” “Expedition that I referred with much hesitation to E. afer Stebbing in 1912, and in two the merus of one or more of the last three pairs of peraeopoda is expanded in the same way as it is in one of the Gough Island specimens, though not quite to the same extent.