. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 66 DISCOVERY REPORTS middle of rami of uropod 3, apex truncate or slightly emarginate according as it is observed in its natural form or flattened, each apex with a spinule and a setule. Antenna 1 very stout, 1st joint obese, flattened on inside but dorsal margin not sharply keeled, 2nd joint very short, as broad as 1st, 3rd wider dorsally than ventrally, just visible ventrally on outside but on inside entirely masked by the 1st flagellar joint which is thus in continuity with the 2nd peduncular
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 66 DISCOVERY REPORTS middle of rami of uropod 3, apex truncate or slightly emarginate according as it is observed in its natural form or flattened, each apex with a spinule and a setule. Antenna 1 very stout, 1st joint obese, flattened on inside but dorsal margin not sharply keeled, 2nd joint very short, as broad as 1st, 3rd wider dorsally than ventrally, just visible ventrally on outside but on inside entirely masked by the 1st flagellar joint which is thus in continuity with the 2nd peduncular joint (cf. Kerguelenia antarctica, Brnrd., 1930, p. 318, fig. 1 b); flagellum 10-jointed, 1st joint stout, elongate, strongly setose on inner and lower surfaces, the other nine joints short, accessory flagellum 4-jointed, 1st joint elongate, lying in a groove on 1st flagellar joint, setose on its lower margin. No sexual difference except that there are eight short joints following the large 1st joint in ?.. Fig. 25. Allogaussia navicula, a. Antenna 1. b. Antenna 2 (3rd peduncular joint onwards), c. Mandible. d. Gnathopod 1. e. Side-plate 4. /. Side-plate 5 and 2nd joint of peraeopod 3. g. Side-plate 6 and 2nd joint of peraeopod 4. /;. 2nd joint of peraeopod 5. i. Telson. ;. Pleon segments 3-6. k. Uropod 3. /, Profile of epistome and upper lip. Antenna 2 slender, 4th joint longest, 4th and 5th strongly setose on upper margins, flagellum 10-jointed in <$, 9 in $. Epistome expanding from near bases of 1st antennae into a broad oblong lamina, rounded at upper and lower corners, separated by a deep curved groove from the upper lip, which is gibbous but not projecting beyond the epistome. Mandible, cutting edge somewhat rounded without any denticles, secondary cutting plate and spine row absent, molar well developed, rugulose, palp longer than trunk, inserted about in middle of trunk and behind molar, 2nd joint a little more than twice as long as 3rd, distal half of margin
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
