. a. b. c d Fig. 120. Pontogeneia tristanensis, a. Pleon segment 3. b. Telson. c. Head. d. Side-plate 4. Genus Pontogeneiella, Schell. Schellenberg, 1929 a, p. 278. In explanation of the terms "schuppen-formig" (key, p. 276) and "flache lamella" (p. 278) used by Schellenberg in describing the rudimentary accessory flagellum, it may be stated that they refer merely to the distal margin of the 3rd peduncular joint. There is no articulated accessory flagellum or rudiment thereof. Pontogeneiella brevicornis (Chevr.) (Fig. 118/). Chevreux, 1906, p. 79, figs. 45-47; 1911, p
. a. b. c d Fig. 120. Pontogeneia tristanensis, a. Pleon segment 3. b. Telson. c. Head. d. Side-plate 4. Genus Pontogeneiella, Schell. Schellenberg, 1929 a, p. 278. In explanation of the terms "schuppen-formig" (key, p. 276) and "flache lamella" (p. 278) used by Schellenberg in describing the rudimentary accessory flagellum, it may be stated that they refer merely to the distal margin of the 3rd peduncular joint. There is no articulated accessory flagellum or rudiment thereof. Pontogeneiella brevicornis (Chevr.) (Fig. 118/). Chevreux, 1906, p. 79, figs. 45-47; 1911, p. 403. Chilton, 1925, p. 178. Schellenberg, 1929 a, p. 278. Occurrence: 1. St. 165. South Orkneys. 1 $ 22 mm. (antennae lost) from stomach of Notothenia. 2. St. 173. South Shetlands. 5 $<$ 12-13 mm., 11 ?? 12-15 mm. 3. St. WS 56. South Georgia. 3 immat. $? 18 mm. Remarks. Integument minutely shagreened, with scattered pits. Distribution. Palmer Archipelago; South Orkneys; South Sandwich Islands. Pontogeneiella longicornis (Chevr.) (Fig. 118/). Chevreux, 1906, p. 84, figs. 48-50; 1913, p. 179. Schellenberg, 1929 a, p. 278; 1931, p. 190. Occurrence: 1. St. 190. Palmer Archipelago (315 m.). 1 immat. $ 26 mm. 2. St. WS 25. South Georgia. 1 $ 18 mm. 3. St. MS 10. South Georgia. 3 $$ 15-21 mm. 4. St. MS 67. South Georgia. 1 $ 15 mm. Remarks. Integument as in brevicornis. There would seem to be considerable likeli- hood of this species being merged in brevicornis. The serration of the hind margin of
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