180 Metopa 



16. M. aequieornis ü. Sars 1879 M. aeqvicornis, U. O. Sars in: Arch. Xaturv. 

 Kristian., t?. 4 p. 453 | 1885 M. a., O. Ü. Sars in: Xorske Nordiiavs-Exp., r. 6 Crust. I 

 p. 188 t. 15 f. 5 I 1893 M. aequieornis, A. Della Valle in: F. Fl. Neapel, ??. 20 p. 644. 



Body ratber stout, back round. Head, lateral corners little projecting. Side- 

 plate 4 elliptic, broader thau deep, larger than 2^ and 3*^ combined, coucealing S**» 

 and 6*^ Pleon segraent 3, postero-lateral corners slightly produced but obtuse. 

 Eyes small, round, red. Anteunae 1 and 2 nearly as long as the body, subequal. 

 Antenna 1, 1^* Joint a little sborter than 2^, flagellum slender, a little longer 

 than peduncle, with many joints. Antenna 2, ultimate Joint of peduncle longer 

 than penultimate and as long as flagellum. Gnathopod 1 as in M. spectabilis 

 (p. 176). Gnathopod 2, 6^^* Joint very large, distally dilated, palni somewhat oblique, 

 almost straight, coarsely dentate throughout. and defined by a short triangulär 

 projection. Peraeopods 1 — 5, uropods 1 — 3 and telsou resembling those of 

 M. spectabilis. Colour whitish, pellucid, with some very ftiint pigmentation. 

 L. 7'5 mm. 



Arctic Ocean (South- West of Spitzbergen). Depth 1400 m. 



17. M. borealis O. Sars 1882 M. b. (part.), (t. 0. Sars in: Forh. Selsk. Christian., 

 nr. 18 p. 91 t. 4 f . 4 j 1887 M. b.?, H. J. Hansen in: Vid. Meddel., ser. 4 r.9 p. 91 t. 3 

 f. 4, 4a I 1892 M.b., Ü. 0. Sars, Crust. Norvvay, v.l p.254 t.89f. 1 | 1893 M.b., A. Della 

 Valle in : F. Fl. Neapel, v. 20 p. 644. 



Body rather stout. Head, lateral corners rounded. Side-plates large,4*^ much 

 larger than 2*^ and 3^ combined. Pleon segment 3, postero-lateral corners acutely 

 produced. Eyes round, dark red. Antennae 1 and 2 short, antenna 1 slightly 

 shorter than antenna 2, P* Joint as long as 2^ and 3'^ combined, flagellum 

 longer than peduncle, 1 2-jointed. Antenna 2, ultimate Joint of peduncle rather 

 longer than penultimate, and equal to flagellum. Gnathopod 1 small, 6^^ Joint 

 about as long as 5^^, narrowly oval, with no distinct palm. Gnathopod 2, 

 6*^ Joint oblong, slightly expanded distally, palm slightly oblique, little curved, 

 coarsely and irregularly denticulate throughout, detined by a tooth. Peraeo- 

 pods 2 — o stout; in peraeopod 4, 2'^ Joint broadly oval, 4*^ broad and 

 decurrent almost to end of 5*^'. Uropod 3, peduncle with 2 spinules, much 

 shorter than ramus, of which 2*^ Joint is shorter than 1***. Telson without 

 spines, oblong oval, apex obtuse. L. 9 5 — 7 mm. 



Arctic Ocean and North-Atlantic (Norway, Greenland). 



18. M. rubrovittata 0. Sai-s ?1869 Probolium alderi (err.. non Montagna 

 alderii Eate 18.")7I), A. 31. Norman in: Rep. Brit. Ass., Meet. 38 p. 273 j 1882 Metopa 

 rubrovittata, G. 0. Sars in: Forh. Selsk. Christian., nr. 18 p. 90 t. 4 f. 2,2a | 1889 M.r., 

 Hoek in: Tijdschr. Nederl. dierk. Ver., ser. 2 t\ 2 p. 188 t. 7 f. 4, 4' | 1892 M. r., Q. O. 

 Sars, Crust. Norway, v. 1 p. 255 t. 89 f . 2 | 1893 M. r., A. Della Valle in: F. Fl. Neapel, 



V. 20 p. 645. 



t 



Body stout and compact. Head, lateral corners angular. Side-plate 4 much 

 broader than deep, nearly twice as large as 2*^ and 3*^ combined. Pleon segment 3, 

 postero-lateral corners produced but obtuse at apex. J^yes rather small, 

 round, dark red. Antenna 1 short, a little longer thau antenna 2, 1®^ Joint 

 rather longer than 2*^ and 3"^ combined, flagellum longer than peduncle, 10-jointed. 

 Antenna 2, ultimate and penultimate joints of peduncle subequal, flagellum longer 

 than both combined. Gnathopod 1, G*'^ Joint narrower than 5*^ subequal to it in 

 length, palm imperfectly defijied by a spiue about in the middle of the bind 

 margin. Gnathopod 2 rather powerful, 6*^^ Joint oblong quadrangular, but 

 wideniug a little distally, palm nearly transverse, convex, regularly seiTate, 



