. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 3i° DISCOVERY REPORTS Gnathopod 2, 5th joint ovate, with a pointed tooth near base and an obliquely truncate broader tooth near hinge on inner margin. In ? both gnathopods are similar to those of 3 but not quite so strong. Peraeopods 5-7 not very strongly expan- ded, distal anterior corner of 2nd joint pro- duced ventrally as a sharp tubercle, stronger in ? than c?, 3rd joint feebly expanded, 4th with antero-distal angle sharp and turned outwards, 6th narrow-ovate, inner margin very slightly sin
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 3i° DISCOVERY REPORTS Gnathopod 2, 5th joint ovate, with a pointed tooth near base and an obliquely truncate broader tooth near hinge on inner margin. In ? both gnathopods are similar to those of 3 but not quite so strong. Peraeopods 5-7 not very strongly expan- ded, distal anterior corner of 2nd joint pro- duced ventrally as a sharp tubercle, stronger in ? than c?, 3rd joint feebly expanded, 4th with antero-distal angle sharp and turned outwards, 6th narrow-ovate, inner margin very slightly sinuous, dactyl strongly curved. Branchiae single on both segments 3 and 4, short, about as long as segments 2 and 3 together, stout, accessory appendage in 3 a short pointed process, single on both segments; in ? absent. Length: 3 8-5 mm., $ 8 mm. Colour (as preserved) dull pinkish brown, eyes black. Remarks. A very distinct species. In having unusually well-developed processes , , r> j T-> 1 • on the rudimentary pleon it resembles Fig. 171. Cyamusbalaenopterae, Dorsal view °" ""' lu J r of .J, with pleon further enlarged, b. Dorsal view of physeteris. The dactyls of peraeopods 5-7 $. c. Ventral view of peraeon segments 5-7 9, with ajso somewhat resemble those of the species just mentioned in their strongly drepani- form proximal joints of peraeopods 5-7. d. Branchial, e. Gnathopod 1 $. f. Gnathopod 2 <J. Genus Paracyamus, G. O. Sars. Sars, 1895, p. 669. Gnathopods 1 and 2 unequal. Antenna 2, 4-jointed. Maxilla 2 with outer lobes. Maxilliped, palp well-developed in young, but rudimentary in adult. Dactylus and unguis of gnathopod 1 evenly tapering, the latter not distinct. Branchiae single on both segments 3 and 4. Paracyamus erraticus (R. de Vauz.) (Fig. 172). R. de Vauzeme, 1834, p. 259, pi. viii, figs. 22, 23. Liitken, 1873, p. 260, pi. iii, fig. 5. Stebbing, 1910 a, p. 472. Chevreux, 1913, p. 183, fig. 62 (maxilliped). Occurrence
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