. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. i2o DISCOVERY REPORTS Description. Head with a small notch between two short subacute points at the antero- inferior angle. Peraeon segments 1-6 dorsally smooth; segment 7 with a pair of short dorsal processes, flanked by a smaller dorso-lateral tooth. Postero-inferior angles of segments 1-4 rounded, of 5 subacute, of 6 and 7 produced backwards in a small (seg- ment 6) or large (segment 7) point. Peraeon segments not imbricate below. Side-plates 1-3 rounded below, 4 subacute below, lower margin
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. i2o DISCOVERY REPORTS Description. Head with a small notch between two short subacute points at the antero- inferior angle. Peraeon segments 1-6 dorsally smooth; segment 7 with a pair of short dorsal processes, flanked by a smaller dorso-lateral tooth. Postero-inferior angles of segments 1-4 rounded, of 5 subacute, of 6 and 7 produced backwards in a small (seg- ment 6) or large (segment 7) point. Peraeon segments not imbricate below. Side-plates 1-3 rounded below, 4 subacute below, lower margin not deeply excavate; 5-7 ending behind in small points, largest on 7. Pleon segments 1-3 each with a pair of dorsal processes, flanked on segments 1 and 2 by a smaller tooth, and a strong medio-dorsal carina which ends posteriorly in a more or less acute tooth; segment 4 with a slight dorsal depression; lateral margins of segments 1-3 with a more or less upturned tooth; postero-inferior angles of segments 1 and 2 also with an upturned tooth; dorso-lateral keels on segment 6 ending bluntly. Telson ovate-oblong, slightly incised, lobes Fig. 67. Iphimediella nodosa (Dana), a. General view, b and c. Right and left mandibles respectively, d. Telson. Antenna 1, 1st joint with two very short teeth on inner distal margin, 2nd joint also with one very short tooth on inner upper apex. Upper lip longer than broad, incised, but not deeply (not so deeply as the telson). Mandible, cutting edge with numerous graduated teeth, secondary cutting-plate in left mandible only, broad, multidentate, no spine-row or molar (cf. Delia Valle, pi. lviii, fig. 89). Maxilla 1, palp rather strong (cf. Delia Valle, pi. lviii, fig. 90). Maxilliped, 2nd joint of palp slightly expanded distally, but scarcely produced (cf. pacifica, Stebb., 1S88, pi. lxxi, or 1906, fig. 55). Peraeopods 3-5, 2nd joints broadly expanded, hind margin with a short point at upper angle, and a stronger one at lower angle in p
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