Metopella, Metopoides 185 



6. M. longimana (Boeck) 1871 Metopa l, A. Boeck in : Forh. Selsk. Christian., 

 1870 p. 144 i 187Ü M. l. (pari), A. Boeck, Skand. Arkt. Araphip., v. 2 p. 464 

 1. 17 f. 6! 1887 M.l, H.J.Hansen in: Vid. Meddel., ser.4 v.9 p. 95 t. 3 f. 8— 8b | 

 1893 M.I., A.DellaValle in: F. FI. Neapel, i;.20 p.643 t.59 f. 61 | 1892 M. l, Metopella 

 (part.), (t. 0. Sars, Crust. Norway, v. 1 p. 273 t. 97 f. 1. 



Body strongly built, integumeut firm. Head, lateral aagles acute. Side- 

 plate 4 unusually large, completely coveriug 5*^, <ö^^ and 7*^. Pleon segment 3 

 slightly produced, siibquadrate. Eyes round. Antennae 1 and 2 subequal in o , 

 antenna 1 the shorter in 6. Antenna 1, flagellum 8-jointed. Antenna 2,. 

 ultiraate Joint of peduncle much shorter than penultimate. Gnathopod 1, 4* Joint 

 moderate ly produced, 6*'' decidedly shorter than 5^^, almost linear. Gnathopod 2, 

 6*^ Joint in o nearly as in M. neglecta, but palm almost straight, slightly seiTate, 

 defined by a decided tooth; in 6 larger, with 2 excavations in the palm 

 near the tooth. Peraeopods 1 — 5 slender, throughout, only 2^ Joint of 5**» 

 with slight linear widening. Uropod 3, peduncle with 2 spines, joints of ramus 

 subequal. Telson oblong oval, obtuse at apex, with 2 pairs of lateral spines. 

 L. about 3 mm. 



Arctic Ocean and Xorth-Atlantic (Greenland): Xorth-Sea (Xorway) and Christiauia- 

 fjord. Depth 72—110 ni. 



3. Gen. Metopoides Della Valle 



1893 Metopoides (part), A. Della Yalle in: F. Fl. Xeapel, ü.20 p. 907. 



Antenna 1 shorter than antenna 2, with veiy small 2-jointed accessory 

 flagellum. Mandibular palp, 3"^ Joint small, with 2 apical setae. Maxiila 1, 

 palp large, 2-jointed. Maxillipeds (Fig. 49), inner plates not very small, 

 doubtfiilly separate, outer plates very small but apparent. Gnathopods 1 and 2 

 (Fig. 50) subchelate. Peraeopods 4 and 5. 2*^ Joint expanded. Uropod 3, peduncle 

 shorter than ramus. 



3 species. 



Synopsis of species: 



( Peraeopods 3 — ^5, 4tli Joint narrow 1. M. magellanicus . . p. 185 



\ Peraeopods 3 — 5, 4tli Joint not narrow — 2. 



J Gnathopod 2, 6th Joint elongate 2. M. parallelocheir . p. 186 



\ Gnathopod- 2, 6th Joint short 3. M. compaetus . . . p. 186 



1. M. magellanicus (Stebb.) 1888 Metopa magellanica, T. Stebbing in: Rep. 

 Voy. Challenger, f. 29 p. 756 t.41 | 1893 M. m., Metopoides magellanicus, A. Della Valle 

 in : F. Fl. Neapel, v. 20 p. 644, 907, 938. 



Head, lateral angles little produced, obtuse. Side-plate 3 a little narrowed 

 dowuward, 4*^' of equal breadth and depth, larger than 2^ and 3*^ combiued. 

 Pleon segment 3, postero-lateral corners subquadrate. Eyes round. Antenna 1, 

 3^^ Joint longer than half 2*^, flagellum louger than peduncle, 13-jointed. 

 Antenna 2, penultimate Joint of peduncle long and slender, rather shorter than 

 ultimate, flagellum 8- or 9-jointed. Maxillipeds, inner plates probably not 

 separate except at apex, outer plates consisting of small apical processes on 

 joints of considerable length and width. Gnathopod 1, b^^ ^oint rather 

 shorter than the oval 6^^, palm very oblique, finely pectinate, defined by 

 2 spines, to which the long finger reaches. Gnathopod 2, b^^ Joint much 

 shorter than 6^^ cup-like, 6*^ widest where the long oblique palm with 

 close row of spines meets the much shorter bind margin ; finger long, curved. 

 Marsupial plates almost circular. Peraeopods 1 — 5, 4:^^ Joint long, scarcely 



