654 Jassa 



of 5*^ nearly as deep as 4^'^. Pleon segment 3, postero-lateral corners obtuse. 

 Eyes longitudiually oval, Anteuna 1, 1^* Joint '^/^ as long as 2*^, 3^ as long 

 as 2*^; flagellum a little longer than 3"^ Joint of peduncle, with 7 joints, 

 ist much the longest. Antenna 2 much longer, about ^4 ^s long as body; 

 ultimate Joint of peduncle very long, l^/g timesaslong as penultimate, not setose; 

 flagellum shorter than ultimate Joint of peduncle, 6-jointed. Gnathopod 1, 

 6*^ Joint piriform, the narrow part apical; finger finely servate. Gnathopod 2 

 in ö very large and powerful; the 6^^ Joint long, slightly curved, with tooth 

 of moderate length springing from near the base and having in a notch on 

 the outer side a tuft of spines or setae; a triangulär tooth is near the finger- 

 hinge, and against this a prominence of the long finger works, while its 

 apex closes down on to the outer notch of the other tooth. Gnathopod 2 

 in 9 differs from <S in that the proximal tooth is represented by a rounded, 

 truncate prominence of the hind or palmar margin. Peraeopods 1 and 2 

 comparatively short and weak; 4**^ Joint distally widened. Peraeopods 3 — 5 

 successively longer, 2"^ Joint well expanded, its bind margin in peraeopod 3 

 weakly concave, in 4*^ straight, in 5*^ weakly convex. Telson small, rounded 

 triangulär, rather broader than long, with 1 spine on each side of the apex. 

 Colour grey and whitish, variegated with brown. L. 12 — 26 mm. 



South- Atlantic (South Georgia). At lowest ebb of spring-tides. 



4. J. pulehella Leach 1813/14 J. p., Leach in: Edinb. Enc, v.7 p. 433 | 1899 

 J. p., T. Stebbing in: Ann. nat. Hist., ser. 7 v.3 p. 239 | 1830 Poäocerus pulchellus^ 

 H. Milne Edwards in: Ann. Sei. nat., v.2Q p. 384 | 1843 P. calcaratus, H. Eathke in: 

 N. Acta Ac. Leop., u20i p. 91 t. 4 f. 9 | 1851 Ischyrocerus (P.) c, I. anguipes (err., non 

 ISangvipes Kröyer 1838!), W. Liljeborg in: Öfv. Ak. Eörh., v. 8 p. 23 | 1853 & 55 Crato- 

 phium validum, J.D.Dana in: U. S. expl. Exp., ul3ii p.841; t.56 f.2 | 1886 Podocerus 

 validus, G. M. Thomson & Chilton in: Tr. N. Zealand Inst., «;. 18 p. 143 | 1857 P.falcatus 

 (err., non Cancer (Gammarus) f. Montagu 1808!), Bäte in: Ann. nat. Hist., ser. 2 v. 19 

 p.l48 I 1876 P. f. (part.), A. Boeck, Skand. Arkt. Amphip., v.2 p.603 t.27 f.4, 7 | 1879 

 P. f., Hoek in: Tijdschr. Nederl. dierk. Ver., vA p.l20 t.8 f. 13— 15; t.9 f. 1—3 | 1881 

 P.f., Nebeski in: Arb. Inst. Wien, ».3 p. 151 t. 13 f. 44 | 1887 P. f., J. Bonnier in: 

 Bull. sei. Nord, v. 18 p. 340 | 1893 P.f. (pari), A. DellaValle in: F. Fl. Neapel, i;.20 

 p. 445 t. 14 f. 1-10; t. 57 f. 13-16 [ 1894 P. f., G. 0. Sars, Crust. Norway, v. 1 p. 594 

 t. 212 I 1895 P.f., A.O.Walker in: Ann. nat. Hist., ser. 6 ». 15 p. 472 | 1862 P. pul- 

 chellus -\- P. validus -\- P. f. -\- P. pelagicus (err., non Jassa pelagica Leach 1813/14!), 

 Bäte, Oat. Amphip. Brit. Mus., p.253 t. 43 f. 8; p. 253 t. 43 f. 9; p. 255 t. 44 f. 1; p. 255 

 t.44 f.2 I 1879 P. australis, Haswell in: P. Linn. Soc. N.S.Wales, v.A p.338 t. 21 f.8 | 1888 

 P. falcatus -j- P. validus, T. Stebbing in: Rep. Voy. Challenger, u 29 p. 1132 t. 119; 

 p. 1135 t. 138b. 



Body more slender and compressed in d than in Q . Head, lateral 

 lobes small, rounded, prominent. Side-plate 1 somewhat angularly produced 

 forward, 2'^ in ö broader than deep, 3^ and 4*^ in c^" considerably deeper 

 than 2"^ or 5*^. Pleon segment 3, postero-lateral corners quadrate, with 

 minute projectiug point. Eyes small, rounded, dark. Antenna 1 not half 

 as long as body, 3^ Joint considerably longer than 1^*, shorter than 2^ or 

 flagellum; flagellum 5 — 9-jointed. Antenna 2 much longer and stouter, 

 especially in d; ultimate Joint of peduncle usually longer than penultimate; 

 flagellum with 3 — 6 joints, 1^* much the longest; flagellum and at least 

 ultimate Joint of peduncle often carrying fascicles of plumose setae. Gnatho- 

 pod 1, 6*^ Joint oval or somewhat piriform; palm straight, oblique, defined 

 slightly by au obtuse angle and palmar spines. Gnathopod 2 in (5, 5*^ Joint 

 masked by 4*^, cup-shaped, very small, obscurely separated from 6*^ 6*^ 

 very large, naiTOW, nearly straight, palm nearly parallel to front margin, 



