Explanation of the plates. Abbreviations common to all figures. a1 = antennulae (first pair of antennæ). a2 = antennae (second » » » ). M = mandibles. m1 = maxillulæ (first pair of maxillæ). m2 = maxillæ (second » » ). mxp = maxillipeds. p1-p7 = first—seventh pairs of pereiopods. pl1—pl5 = first—fifth pairs of pleopods. u = uropods. Fig.11.Edotia magellanica CUNNINGHAM, pleon from above. Fig.11 A. » » , pleon en profile. Fig.12. » Lilljeborgi n. sp. Fig.13. » oculata n. sp. Fig.13 p1x. » » , hand of first pair of pereiopod