336 Melphidippa 



outer tooth is the longer. Colour whitish, varied with reddish brown. 

 L. 9 9 mm. 



Arctic Oeean, North-Atlantic and Xorth Sea (Spitzbergen, Kara Sea, Norway, 

 Scotland). Depth 9—94 m. 



2. M. maerura O. Sars 1894 M. m., G. O. Sars, Crust. Norway, v. 1 ]). 484 

 t. 170 f. 1. 



Pleon Segments 1 — 3 each produced to a dorsal tooth, with the hind 

 margin on either side of it finely denticulate, segments 4 and 5 each 

 produced to a long somewhat curved tooth. Head, lateral coruers narrowly 

 rounded. Pleon segments 1—3, postero-lateral margins smooth, except in 

 Segment 3, which has the postero-lateral corners produced to a small tooth. 

 Eyes about as in M. goesi (p. 335). Antenna 1, 2<^ Joint nearly twice as long as 

 V^ , 3^ uearly -/g length of 2*^, flagellum little louger than peduncle, about 

 15-joiuted, accessory flagellum rather long, 4-jointed. Antenna 2 scarcely 

 shorter, ultimate Joint of peduncle rather louger than penultimate, and longer 

 than flagellum. Gnathopod 1, 5*^ Joint less expanded than in M. goesi. 

 Gnathopod 2, 5^** Joint expanded in an oblong form between the narrow 

 extremities, 6*^ much smaller, subfusiform as in gnathopod 1, fiuger rather 

 elongate. Peraeopods 1 and 2, 5*^^ Joint subequal to 6*^ and scarcely 

 longer (shorter in figure) than the 4^^. Peraeopods 3 — 5 as in M. goesi, 

 except that the 2^ Joint of peraeopod 3 is not produced. üropods 1 — 3 

 nearly as in M. goesi, except that uropod 3 is still more etongate, with 

 the peduucle considerably longer than the rami. Telson with a single pair 

 of lateral spinules close to the base, 2 pairs of setae near top of cleft, 

 which extends beyond the middle, inner tooth of each bidentate apex very 

 Short, the spine in the notch not elongate. L. Q 8 mm. 



Xorth- Atlantic (West-Norway). 



3. M. borealis Boeck 1871 M. b., A. Boeck in: Forh. Selsk. Christian., 1870 

 p. 219 I 1876 M. h., A. Boeck, Skand. Arkt. Amphip., v.2 p. 415 t. 23 f. 3 i 1894 M. h., 

 G. O. Sars, Crust. Norway. v. 1 p. 486 t. 170 f. 2 | 1893 Ceradocus h., A. DellaValle in: 

 F. FI. Neapel, v. 20 p. 720. 



Pleon segments 1 — 5 each produced into a small dorsal tooth, with 

 deuticulation of the hiud margin on either side of it in segments 2—5. 

 Head, latei'al corners broadly rounded. Pleon segments 1—3, postero- 

 lateral margins smooth, postero-lateral corners of segment 3 quadrate. Eyes 

 rather small, rounded, red with whitish coating. Antenna 1, 2*^ Joint longer 

 than 1^*, 3*^ about half as long as 2^, flagellum twice as long as peduncle, 

 19-jointed, accessory flagellum louger than 3^ Joint of peduncle, 5-jointed. 

 Antenna 2. scarcely shorter, ultimate and penultimate joints of peduncle 

 subequal, flagellum half as long as peduucle, 4-jointed. Gnathopod 1 about 

 as in the preceding species. Gnathopod 2, 5*^^^ Joint a little expanded, 6*^*^ fully 

 as long as 5*'^, long oval, palm very short, finger small. Peraeopods 1 

 and 2, 5*'' Joint nearly as long as 4*^, longer than 6**^. Peraeopods 3 — 5 

 as in M, maerura. üropods 1 — 3 as in M. goesi (p. 335). Telson very 

 narrow, nearly thrice as long as broad, cleft beyond middle, lateral margins 

 smooth, a small spine in each apical notch. Colour whitish, broadly 

 banded across with chestuut brown patches; ova in pouch dark bluish. 

 L. o 7 mm. 



Arctic Ocean, North-Atlantic, North-Sea and Skagerrak (Norway from Christiania- 

 fjord to Vadsö). Depth 54 — 188 m. 



