176 Metopa 



longer than flagellum. Gnathopod 1 small, 4*^^ Joint not much produced, 

 5**1 as long and broad as 6*^ wMch is imperfectly subchelate. Gnathopod 2 

 strong, especially in d, 4*^ Joint (as in M. norvegica, M. spectabilis and 

 M. robusta) produced on the inner side in a thin triangulär lamella, so as 

 to have a cup-shaped appearance like the 5*^, 6*^ in 9 oblong oval, palm 

 oblique, armed with 8 teeth beginning at the hinge of the finger and 

 followed by a deeply sinuous part which reaches the defining tooth; 6^^ in 

 ö much larger, palm with 5 or 6 teeth followed by a deep excavation 

 and a large defining tooth. Peraeopods 3 — 5, with 4*^ Joint decurrent and 

 rather wide, 2^ Joint well expanded in peraeopods 4 and 5, in the latter rather 

 widened below. üropod 3, peduncle with 5 minute spines,, nearly as long 

 as ramus, of which the 2 joints are equal. Telson large, oblong oval, 

 broadly rounded at apex. Colour whitish, obliquely banded with reddish 

 patches. L. 7 mm. 



Arctic Ocean, North- Atlantic, North-Sea and Skagerrak (South- and West-Norway, 

 depth 38 — 113m; Spitzbergen; Murman coast; Iceland; British Isles); Kattegat. 



8. M. spectabilis O. Sars 1876 M. clypeata var.,^ A. Boeck, Skand. Arkt. 

 Amphip., V.2 t. 18 f. 5 ] 1876 M. alderi (err., non Montagua alderii Bäte 1857!), G. ü. 

 Sars in: Arch. Naturv. Kristian., v.2 j). 255 | 1879 M. spectabilis, G. 0. Sars in: Arch. 

 Naturv. Kristian., v. 4 p. 451 | 1885 M. s., G. 0. Sars in: Norske Nordhavs-Exp., v.6 

 Crust. I p. 185 t. 15 f. 4 a— n \ 1892 M. s., G. O. Sars, Crust. Norway, v. 1 p. 251 t. 87 | 

 1893 M. s., A. Della Valle in:' F. Fl. Neapel, v. 20 p. 641 t. 59 f. 58. 



Body rather slender. Head, lateral corners obtusely rounded. The much 

 greater size is the chief distiuctiou between this species and M. alderii (p. 175) 

 but also, eyes comparatively much smaller; antenna 1 in both ö and $ 

 much shorter than antenna 2, which have ultimate and penultimate joints of 

 peduncle long and strong and flagellum very short; gnathopod 1, 6*^ Joint 

 rather shorter than 5**^; gnathopod 2, 6*'' Joint in 9 with palm more oblique 

 and its sinus deeper, in ö very large, the defining tooth much larger, the 

 excavation deeper, the dentate portion of the palm having the hindmost 

 tooth much larger than the others; uropod 3, peduncle as long as ramus, 

 2"^ Joint of ramus shorter than 1^*; telson rather uarrower. L. Q 14 mm. 



Arctic Ocean (Hammerfest [Finmark], depth 94 — 149 m); North- Atlantic. 



9. M. affinis Boeck 1871 M. a., A. Boeck in: Forh. Selsk. Christian., 1870 

 p. 142 1 1876 M. a., A. Boeck, Skand. Arkt. Amphip., v. 2 p. 459 t. 19 f. 2 | 1892 M. a., 

 G. 0. Sars, Crust. Norway, v. 1 p. 260 t. 91 f. 2 j 1893 M. a., A. Della Valle in: F. Fl. 

 Neapel, v. 20 p. 644. 



Body in ö slender, but not much compressed. Head, lateral corners 

 rounded. Side-plates smaller than usual. Pleon segment 3, postero-lateral 

 corners nearly quadrate. Eyes small, round. Antenna 1 longer than antenna 2, 

 1^* Joint longer than 2<^, flagellum nearly twice as long as peduncle, not 

 veiy slender. Antenna 2, ultimate and penultimate joints of peduncle subequal, 

 together as long as flagellum. Gnathopod 1, 4*^ Joint broadly produced, setose, 5*^ 

 rather long, subfusiform, 6*^ a little shorter, much narrower, nearly linear, 

 finger very short, stout, setose on inner margin. Gnathopod 2 powerful, 

 5*'» Joint wide, cup-shaped, 6*^ very large and broad, subquadrate, though 

 somewhat widening distally, palm nearly trausverse, smooth, little curved, 

 defined by a small tooth. Peraeopods 1 — 5 powerful, 6*^ Joint somewhat 

 curved, finger strong and curved. In peraeopod 5, 2'* joiut comparatively 

 small, oval quadraugular, 4**" sti'ongly dilated, but only little decurrent. 



