Archive image from page 236 of Discovery reports (1932) Discovery reports discoveryreports05inst Year: 1932 PHOTIDAE 227 Gnathopod 1, 6th joint subcircular, shorter than 5th, palm forming a prominent rounded angle with hind margin; alike in both sexes. Gnathopod 2, 2nd joint shallowly channelled, distal angles not produced in lobes, 5th subtriangular, shorter in 3 than in $, 6th in cJ oblong, widening slightly distally, its breadth subequal to length of 5th, palm slightly oblique, shorter than hind margin, defined by a strong tooth which is not bent inwards, with two strong teeth, the lower
Archive image from page 236 of Discovery reports (1932) Discovery reports discoveryreports05inst Year: 1932 PHOTIDAE 227 Gnathopod 1, 6th joint subcircular, shorter than 5th, palm forming a prominent rounded angle with hind margin; alike in both sexes. Gnathopod 2, 2nd joint shallowly channelled, distal angles not produced in lobes, 5th subtriangular, shorter in 3 than in $, 6th in cJ oblong, widening slightly distally, its breadth subequal to length of 5th, palm slightly oblique, shorter than hind margin, defined by a strong tooth which is not bent inwards, with two strong teeth, the lower triangular, the upper more quadrate, with a subsidiary denticle nearer the hinge, finger strong, closing on to palmar margin but on the inside of the two teeth; in ? less robust, palm more oblique and the palmar teeth less strong. Peraeopods 3-5, 2nd joint elongate, narrow-oblong, front and hind margins sub- parallel, but converging slightly distally, hind margin serrulate, postero-inferior angle quadrate. Peraeopods 4 and 5 subequal in length. Remarks. Although in the form of the hand of gnathopod 2 this species approaches longicornis, Wlkr., triodon, Schell., and trigonnrus, Schell., the length of the 5th joint at once distinguishes it, apart from other characters. The 2nd joint of peraeopod 3 also distinguishes it from longicornis. The similarity of the gnathopods in all the specimens induces me to consider them the same species, in spite of the difference in size between the 33 and the ?$. The large 33 of no. 2 look at first sight very like immature 33 of dimorphus. Eurystheus distichon, Brnrd. (Fig. 141). Barnard, 1930, p. 391, fig. 50 (3). Occurrence: 1. St. 42. South Georgia. 2 $$ 10-11 mm. 2. St. 45. South Georgia. 20 33 9-12 mm., 27 ?$ 8-10 mm., 6 immat. 6-8 mm. 3. St. 123. South Georgia. 5 33 8-10 mm., 4 $? 9-10 mm. 4. St. 144. South Georgia. i(Jn mm. 5. St. 159. South Georgia. 2 33 n-12 mm., 2 $$ 12 mm. 6. St. 160. Shag Rocks. 1 $ 12 mm.
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