. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 52 DISCOVERY REPORTS segment 3 with the lower margin and the slightly convex hind margin meeting in an angle less than 900, the corner rounded (cf. Schellen- berg's fig. 16 b for murrayi); segment 4 with a triangular carina, the posterior margin falling away steeply but obliquely; side-plate 1 produced for- wards and narrowed below, subtriangular or slipper-shaped (cf. adarei); epistome produced in a triangular projection above the upper lip; gnath- opod 1 rather slender, as in adarei; uropod 3
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 52 DISCOVERY REPORTS segment 3 with the lower margin and the slightly convex hind margin meeting in an angle less than 900, the corner rounded (cf. Schellen- berg's fig. 16 b for murrayi); segment 4 with a triangular carina, the posterior margin falling away steeply but obliquely; side-plate 1 produced for- wards and narrowed below, subtriangular or slipper-shaped (cf. adarei); epistome produced in a triangular projection above the upper lip; gnath- opod 1 rather slender, as in adarei; uropod 3 with inner ramus as long as 1st joint of outer ramus, both rami spinulose, without plumose setae; telson ovate, about half as long again as wide, each lobe with two apical and two lateral spines. Remarks. This appears to be a close ally of trigojtica and adarei, but pleon segment 3 and the epistome are distinctive; the carina on segment 4. Fig. 16. Tryphosa triangularis, a. Tel- son. b. Side-plate 1. c. Anterior margin of is not symmetrical as in trigonica. Possibly some of head with peduncle of antenna 1, and the specimens attributed to murrayi by Schellenberg epistome and upper lip. d. Pleon segments (1926, fig. 16 b) should belong here. 3 an 4' The specific name refers to the likeness to trigonica and to the shape of the epistome. Tryphosa analogica, (Fig. 17). Cf. T. serrata, Schellenberg, 1931, p. 34, figs. 15, 16. Occurrence: 1. St. 144. South Georgia. 2 ovig. $9 12 and 15 mm., 1 juv. 6 mm. 2. St. 156. South Georgia. 3 $? 10-13 mm- 3. St. 159. South Georgia. 1 ovig. $ 12 mm. 4. St. WS 25. South Georgia. 1 c? 14 mm., 1 $ 14mm., 2 ovig. $°. 16-17 mm. Types. Description. Antero-lateral angle of head pointed, but not very acute, reaching three-quarters the length of 1st joint of antenna 1. Eyes invisible. Pleon segment 3 with postero-inferior corner pro- duced in a rounded, serrate lobe; segment 4 with a strong subtriangular carina, rounded at apex, posterior mar
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