Melita 427 



broad. üropod 3, outer ramus not quite twice as long as peduncle, inner 

 very minute. Colour whitish. L. 8"5 mm. 



Ikertokfjord [West-GreenlandJ. Depth 56 m. 



10. M. formosa .7. Murdoch 1866 Gammarus denfatus (part.j, Goes in: ÖfV. 

 Ak. Förh., r.22 p. 530 t. 40 f. 29' | 1885 Melita formosa, J. 31urdoch in: P. U. S. Mus., 

 V.7 p. 520 I 1887 M. goesii, H. J. Hansen in: Dijmphna Udb., p. 228 t.21 f. 13 [ 1887 

 M.g., H. J Hansen in: Vid. Meddel., sei-.4 r.9 p. 14»i t. 5 f. 8 | 1896 M. obtusata (p&rt), 

 A. Della Valle in: F. Fl. Neapel, v. 20 p. 711. 



Close to M. deutata. Pleon segraents 2 and 3 produced each to 1 

 dorsal tooth, segment 4 to 3 teeth, segment 5 to 4, all very small. Pleon 

 Segments 1 — 3, postero-lateral corners acute, in segment 3 produced upward. 

 Autenna 1, P*^ Joint not quite so long as 2*^. Gnathopod 1, 6*^ Joint oval, 

 fringed with long hairs on bind margin. Gnathopod 2, 6^^^ Joint in d broadly 

 oval, armed on the bind margin witb 3 or 4 blunt teeth and running out 

 into a broad blunt tooth. palra minutely denticulate, finger large, curved, 

 acute, shuttiug on the inside of the palm. üropod 3, inner ramus ovate. 

 Colour purple, with lighter streak down middle of back (Murdoch). Hansen 

 adds: body depressed, lateral corners of head produced into a long, acute 

 process; side-plates 1 — 4 shallow; peraeopods 3 — 5, '2.^ Joint long and 

 narrow, with front and bind margins subparallel; üropod 3. outer (not inner!) 

 ramus very long; colour red. L. 17-5 — 21 mm. 



Arctic Ocean (nrctic Alaska; .Jugor Schar, depth 19 — ^23 in; West-Greenland, 

 depth 66 m; Spitzbergen, depth 19 — 75 m). 



11. M. dentata (Kreyer) 1842 Gammarus dentatus, Kroyerin: Naturh. Tidsskr., 

 r.\ p. 159 I 1866 &. rL (part.), Goes -in: Öfv. Ak. Förh., i;. 22 p. 530 t. 40 f. 29 j 1862 

 Megamoera dentata^ Bäte, Cat. Amphip. Erit. Mus., p. 225 t. 39 f. 4 | 1871 Melita d., 

 A.Boeckin: Forh.Selsk. Christian., 1870 p. 211 | 1876 M.d. (p&rt.), A.Eoeck, Skand. Arkt. 

 Amphip., V.2 p. 389 t. 23 f. 10 ] 1884 3/. d., J. S. Schneider in: Tromse Mus. Aarsh., v.7 

 p. 113 I 1889 M. d., A.M. Norman in : Ann. nat. Hist.. ser. 6 i;. 4 p. 135 i 1894 M. d. (pari.), 

 G. 0. Sars, Crust. Norway, v.l p. 513 t. 181 f . 1 | I8'>'d Gammarus purpnratus, Stiinpson 

 in: Smithson. Contr., i'. 6 nr. 5 p. 55 ] 1893 Melita palmata (part.), A. Della Valle in: 

 F. Fl. Neapel, r. 20 p. 713. 



Elongate, compressed, but with rouuded back. Pleon segmeuts 1 — 6 

 produced dorsally to several teeth, of which median usually the largest, 

 numbers very variable. Head, post-antennal corners short, dentiform. Side- 

 plates 1 — 4 shallow, P* scarcely expanded distally, P* — 3<^ with lower bind 

 Corner dentiform. Pleon segment 3, postero-lateral corners acutely produced, 

 slightly upturued. Eyes small, rounded oval, black. Antenna 1 nearly as long 

 as body, 1^* Joint with spines on lower margin, a long one at apeit, 2^ Joint 

 longer, 3^ about V4-~V.s of 2^; flagellum longer than peduncle, 36—46- 

 jointed, accessory flagellum 4— 9-jointed. Antenna 2, jpeduncle long, ultimate 

 and penultimate joints subequal, flagellum short, about 13-jointed. Mandibular 

 palp rather slender. 1***^ Joint produced to a dentiform projection, 3*^ and 2^ 

 subequal, or 3'^ the longer. Maxiila 1, outer plate with 7— 9(?) spines. 

 Gnathopod 1 densely setose, 6^*1 Joint (Sars) about as long as 5*'^ oblong oval, palm 

 rather oblique, definedby an obtuse angle; (Norman: 6*^ Joint ovate, muchshorter 

 than 5*^ palm defined by a small tooth-like process. very minutely crenulated 

 and spinulose, finger falcate, its inner margin divided up into minute teeth 

 of peculiar form, widening in the middle and apiculate). Gnathopod 2 much 

 stronger, 5*^ joint rather short, 6*^ rather large, especially in ö, oblong, 

 a little widening to the oblique slightly denticulated palm, which is defined 

 by a tooth-like process, and in ö is angular near the finger-hinge, finger 



