264 Annals of the South African Museum. 
ingens); 35° 4 §. 18° 37’ E. and Kerguelen Is. (Stebbing: P. fal- 
catus); 42° 43' §., 82° 11’ W. and Philippine Islands (Stebbing : 
P. validus) New Zealand and neighbouring islands (Thomson and 
Chilton) ; Ceylon and Zanzibar (Walker) ; South Orkneys (Chilton) ; 
Falkland Islands (Stebbing). 
Gren. ISCHYROCERUS Kroyer. 
1838. Ischyrocerus Kroyer, Danske Selsk. Afh. vol. 7, pp. 283, 287. 
1894. fe G. O. Sars, Crust. Norw. vol. 1, p. 587. 
1900. e Chevreux, R¢és. Camp. Monaco, vol. 16, p. 104. 
1906. * Stebbing, Das Tierreich, 21, pp. 657, 759. 
IscHYROCERUS ANGUIPES Kroyer. 
1838. Ischyrocerus anguipes Kroyer, Danske Selsk. Afh. vol. 7, p. 285, 
pl. 5, figs l4a—m. 
1894. s +minutus G.O. Sars, Le. pp. 588, 589, 
pl. 209, pl. 210, fig. 1. 
1906. 3 es Stebbing, le. p. 658. (References and 
synonyms. ) 
1907. e ” von der Briiggen, Ann. Mus. Zool. St. 
Petersb. vol. 11 [1906], p. 286. 
Body slender in ¢ but rather stout in ?, iridescent. Lateral lobes 
of head somewhat obtuse. Eye small, oval. Side-plates 1-4 in- 
creasing in depth in 9, 1 narrowed below, 5 rather shallower, in ¢ 2-5 
subequal in depth. Postero-lateral angle of 3rd pleon segment 
quadrate. 
Telson broader than long, margins convex, apically rounded, with 
2 submedian apical spines. 
First antenna, 38rd joint longer than either 2nd or Ist, flagellum 
equal to 3rd joint plus half the 2nd, 5-jointed, accessory flagellum 
very small but distinct (in ¢ Ist antenna lost). 
Second antenna a little longer than Ist, ultimate joint longer than 
penultimate, flagellum equal to or a little longer than ultimate joint, 
6-jointed in g,5 in 9. 
Mouth-parts as figured for I. anguipes Kroyer by Sars (1c. pl. 209), 
but distal margin of upper lip a little more convex and 2nd joint of 
mandibular palp comparatively shorter and more angular on inner 
margin. 
First gnathopod, 4th—6th joints rather slender, 5th elongate, nearly 
4 length of 2nd, inferior margin with a rather long but not promi- 
