. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. Euphausia vallentini, Stebbing (Figs. 12-14, 30 i) E. vallentini, Stebbing, 1900, p. 545, pi. xxxvii; Holt and Tattersall, 1906, p. 3; Tattersall, 1908, p. 13, pi. iv, figs. 4-6; Hansen, 1911, p. 30; 1913, p. 32, pi. v, figs, i a-f; Zimmer, 1914, p. 427; 1915, p. 178; Tattersall, 1924, p. 21; Illig, 1930, p. 499; Mackintosh, 1934, p. 76 et seqq.; Hardy and Gunther, 1935, pp. 217-19, fig. 94. E. splendens (part), Sars, 1885, p. 80, pi. xiii, figs. 7-17. E. patachonica, Colosi, 1917, p. 187, pi. x
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. Euphausia vallentini, Stebbing (Figs. 12-14, 30 i) E. vallentini, Stebbing, 1900, p. 545, pi. xxxvii; Holt and Tattersall, 1906, p. 3; Tattersall, 1908, p. 13, pi. iv, figs. 4-6; Hansen, 1911, p. 30; 1913, p. 32, pi. v, figs, i a-f; Zimmer, 1914, p. 427; 1915, p. 178; Tattersall, 1924, p. 21; Illig, 1930, p. 499; Mackintosh, 1934, p. 76 et seqq.; Hardy and Gunther, 1935, pp. 217-19, fig. 94. E. splendens (part), Sars, 1885, p. 80, pi. xiii, figs. 7-17. E. patachonica, Colosi, 1917, p. 187, pi. xiv, figs. 11-14, P'- ^v- ^gs- 15-20. Description. The carapace is not pro- duced far forwards dorsally. The rostrum is a short sharp triangle about as long as or a little longer than broad; it is much more distinct than that of E. liicens. The anterior margin of the carapace is faintly convex behind each eye (Fig. 12 a). The gastric area of the carapace is moderately or sharply convex. The first segment of the antennular peduncle has a very characteristic lobe: it is large, broad and rounded and projects horizontally above the second segment (Fig. 12 a, b). In larger specimens, but not in smaller, there is a small rounded or tooth-like vertical projection on the upper surface of the second segment at the inner distal corner, and a smaller tooth-like pro- jection near the outer distal corner. There is a high dorsal keel on the third segment; the part seen from the side is strongly rounded above and nearly vertical in front. There is a short thin mid-dorsal process from the posterior margin of the third abdominal segment (Fig. 12 f); rarely it is pig. 12. E. vallentini. a, front part of carapace and absent. first segment of antennules from above, x 12. b, left The COpulatory organ of the male is very antennular peduncle from the side, X15. c, median similar to that oiE. lucem and but ^"'^""^ P™"'' °^ ''^'''^ abdominal segment, x 37. easy to distin
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