428 Melita 



large, curved, acute. Peraeopods 1 aud 2 sleuder, short. Peraeopods 3 — 5 

 siiccessively longer, 2^ Joint large, oblong oval, hind margin serrate, with 

 the lower liind corners rounded or subangular. Uropod 3, outer ramus verv long, 

 sublinear, fully twice as long as peduncle, ending in 4 spines, the largest perhaps 

 representing a 2*^ Joint, inner ramus verv small. Telson not nearly reacbing 

 end of peduncle of uropod 3, lobes acute, each with 2 spines inside the point, 

 1 setule outside. Colour varying with the surroundings (Schneider); uniform 

 dark purple, uever varying (Stimpson). L. 11 — 22 ( — 27-5?) mm. 



Arctic and Scandinavian waters; North- Atlantic (Halifax [Nova iScotia], Labrador, 

 Grand Manan, Northumberland). Down to 113 m. 



12. M. gladiosa Bäte 1862 M. g., Bäte (& Westwood), Bnt. sess. Crust., ; . 1 

 p.346 f. I 1862 M. g., Eate, Cat. Ämphip. Brit. 3Ius., p. 185 t. 33 f. 6 | 1876 M. g., 

 T. Stebbing in: Anu. nat. Hist., ser. 4 ».17 p. 77 t. 4 f. 2, 2a— d | 1889 M. g., A. M. 

 Norman in: Ann. nat. Hist., ser. 6 «;. 4 p. 134 | 1893 M. obtusata (part.), A. Della Valle 

 in: F. Fl. Neapel, r. 20 p.711. 



Near to M. obtusata (p. 426). Pleon segments 1 — 6 each with 3 dorsal teetli, 

 but sometimes segments 1, 5 and 6 with more or fewer, or P* with none; teetli 

 large on segments 1 — 4, except central of segment 4, teeth on segment 6 very 

 small. Pleon segment 3, postero-lateral corners acutely produced, upturned, 

 their upper and under margins serrate. Gnathopod 1, 5*i' and 6^*^ joints 

 equal and similar, broadly oval, palra scarcely detined, hind margin of 

 4ih_6th joints with dense fringe of fine short hairs, as in M. obtusata o. 

 Gnathopod 2 in o without the für seeu in gnathopod 1, not mueh larger, b^^ Joint 

 less broad, 6^*^ equal in breadth but longer, palm detined by a small tooth. 

 Gnathopod 2 in d much larger, ö*^'' Joint short, cup-shaped, 0^'^ large, broad^ 

 palm sen-ate, strongly sinuous, with an abrupt curve at the middle, tinger 

 scimitar-shaped, broad almost to the end, but with an acute apex. 



North-Atlantic (South-AV^est-England: North- East-Scotland; Houlugne and West- 

 France; Azores). 



M. appendiculata (Say) 1818 Gammarus appemliculatus, Say in: J. Ac. Philad., 

 r.lii p.374 j 1845 G.rt., Xreyerin: Naturh.Tidsskr., ser. 2 r.\ p.326 18626?.«., Podocerus 

 (part.)?. Bäte, Cat. Amphip. Brit. Mus., p. 223, 224 | 1888 Maera? n., T. Stebbing in: 

 Kep. Voy. Challenger, r. 29 ]). 103 | 1893 Ceradocus? a., Ä. Della Valle in: F. Fl. Neapel, 

 V. 20 p. 765. 



Peraeoii segments 5 — 7 and pleon segments deiitated on their posterior edges. 

 ]j. 7 — 8 mm. 



• United States of America (Georgia). 



M. confervieola (Stimps.) 1857 Maera c, Stimpson in: P. Calif. Ac, n 1 ]». 99 | 

 1857 Gammarus cotifervicolus, Stimpson in: Boston J. nat. Hist., r. 6 p. 520 | 1862 Cr. c. 

 Bäte, Cat. Amphip. Brit. Mus., p.218 t.38 f. 9 | 1899 Melita c, T. Stebbing in: Tr. Linn. 

 Soc. London, ser. 2 v.l p. 425 | 1893 Gammarus marinus (part.), A. Della Valle in: 

 F. Fl. Neapel, v. 20 p. 762. 



L. 12-5 mm. «■ 



Nortli-Pacific (San Francisco, among confervae in salt marshes: Pugets .Suiind). 



M. gayi (Nie.) 1849 AmpJiitoe g., H. Nicolet in: Gay, Hist. Chile, v.H p. 236, 

 Crust. t. 2 f. 6a, b | 1893 Amphithoe g., A. Della Valle in: F. Fl. Neapel, n 20 j.. 463 

 1899 Melita g., T. Stebbing in: Tr. Linn. Soc. London, ser. 2 v.7 p. 425. 



Side-plate 5 much shorter than 4th, 6th deeply emarginate so that the anterior 

 lobe takes the form of a hörn much curved backward (compare M. palmata $ , p. 425). 

 L. about 9 mm. 



Soüth Pacific (off Chili). 



