. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. Proboloides antarcticus, Wlkr. (Fig. 58). Walker, 1907, p. 18, pi. v, fig. 9 (gn. 2 <$, labelled in error "gn. 2 ?"). Occurrence: St. 195. South Shetlands. 1 <J 7 mm. Remarks. Agrees with Walker's figure of the <$, except that the hand of gnathopod 2 is longer, equal to the length of the 2nd joint, and the conical tooth is midway in the palmar excavation between the square- topped crenate tooth near hinge and the defining tooth. Anterior margin of 2nd and 3rd joints of gnathop
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. Proboloides antarcticus, Wlkr. (Fig. 58). Walker, 1907, p. 18, pi. v, fig. 9 (gn. 2 <$, labelled in error "gn. 2 ?"). Occurrence: St. 195. South Shetlands. 1 <J 7 mm. Remarks. Agrees with Walker's figure of the <$, except that the hand of gnathopod 2 is longer, equal to the length of the 2nd joint, and the conical tooth is midway in the palmar excavation between the square- topped crenate tooth near hinge and the defining tooth. Anterior margin of 2nd and 3rd joints of gnathopod 2 channelled, with strong distal lobes. Side-plate 3 with beaded margin as in the other species. Contrary to the opinion expressed in the Terra Nova Report, I now think that perlatus will prove to be a form distinct from antarcticus, and that both are distinct from crenatipalmatus. Distribution. McMurdo Sound. Proboloides carinata (Schell.) (Fig. 59). Schellenberg, 1931, p. 101, fig. 54. Occurrence: 1. St. 42. South Georgia. 1 adult <$ 9 mm., 3 immat. g$ 5-6 mm. 2. St. 123. South Georgia. 1 <$ 8 mm. Description. Deceptively like crenatipalmatus on first glance at the 2nd gnathopods, but at once distinguished by the upstanding apex of pleon segment 3. Side-plate 3 Fig. 58. Proboloides antarcticus, Wlkr. Gnathopod 2 of c. 6. "v «=^>" d Fig. 59. Proboloides carinata (Schell.). a. Gnathopod 2 of immature (J. b. Gnathopod 2 of adult J. c. Gnathopod 1. d. Pleon segments 3-6. beaded on lower margin. Postero-inferior angle of pleon segment 3 quadrate. Gnatho- pod 1, 5th joint relatively longer, 6th relatively shorter, the latter parallel-sided, not distally expanded, palm oblique, setose. Gnathopod 2, notch on palm nearly semi- circular in immature <J, and in adult much more open, it does not undercut the tooth adjoining the tooth which defines the palm, tooth near the hinge with stronger denticles than in crenatipalmatus. Peraeopod 3, 2nd joint distally
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