Melphidippa 835» 



1. Gen. Melphidippa Boeck 



1871 Melphidippa (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p.218 i 1876 

 M., A. Boeck, Skand. Arkt. Amphip., v.2 p. 413 | 1894 M., G. O. Sars, Crust. Xorwajv 

 v.l p.482. 



Side-plate 1 triaugularly produced, lower margin fringed with setules. 

 Eyes imperfectly developed. Antenna 1, peduncle rather long, accessory 

 flagellum well developed. Antenna 2 with peduncle long and densely setose. 

 Mandible, 3*^ Joint of palp little shorter than 2*^. Maxillipeds, palp elongate.. 

 Gnathopod 1, 5*'^ Joint expanded proximally. Peraeopods 1 and 2 setose,. 

 finger long, with setae on both margins. Peraeopods 3 — 5, finger small, 

 in peraeopods 4 and 5 reversed. üropod 3, peduncle elongate, narrow,. 

 rami subequal, linear, spinöse. Telson triangulär, longer than broad, apices. 

 bidentate. 



4 species. 



Synopsis of species: 



j Palm of gnathopod 2 excavate and rather long . . 4. M. seri^ata . . p. 337 

 \ Palm of gnathopod 2 not excavate, short — 2. 



\ Antenna 1, 3d Joint short 1. M. goesi . . . p. 335 



\ Antenna 1, 3d Joint long — • 3. 



, Antenna 1. 2d Joint much longer than Ist; gaatho- 



) pod 2, Stil Joint much longer than 6tli 2. M. macrura . . p. 336 



\ Antenna 1, 2d Joint not much longer than Ist; gnatho- 



' pod 2, Stil Joint not longer than 6tli 3. M. borealis . . p. 336 



1. M. goesi Stebb. 1866 Qammarus spinosus (non Cancer (G.) s., Montagii 

 1813!), Goes in: üfv. Ak. Förh., i;. 22 p. 530 t. 40 f. 30 | 1871 Melphidippa spinosa, 

 A. Boeck in: Forh. Selsk. Christian., 1870 p. 219 | 1876 M. s., A. Boeck, Skand. Arkt. 

 Amphip., v.2 p.417 t. 23 f. 4 \ 1894 M. s., G. 0. Sars, Crust. Norway, v.l p.483 1. 169 j 

 1893 Ceradociis spinosus, A. Della Valle in: F. Fl. Neapel, i\20 p. 719 1899 Melphidippa 

 goesi, T. Stebbing in: Tr. Linn. Soc. London, ser. 2 v.l p. 422. 



Pleon Segments 1 — 3 each produced into 3 sharp dorsal teeth, with. 

 small denticles between them, segments 4 and 5 each produced into a large 

 simple tooth. Head, lateral corners obtusely ti-uncate. Pleon segments 1 — 3, 

 postero-lateral margins in-egularly dentate, in segment 3 postero-lateral 

 corners acutely produced. Eyes oval, narrowed above, red with whitish 

 coating. Antenna 1 long, 2^ Joint much longer than 1^*, 3«^ scarcely 74 as long 

 as 2'^, flagellum nearly thrice as long as peduncle, 24-jointed; accessory 

 flagellum not very large, 2-jointed. Antenna 2 rather shorter, ultimate Joint 

 of peduncle shorter than penultimate, flagellum about half length of peduncle. 

 Gnathopod 1, 5*^ Joint broad, laminar, densely setose at base, narrowed 

 distally, 6^'^ much shorter, subfusiform, setose, palm Ul-defined, finger slender, 

 curved. Gnathopod 2 much more slender, 5^^ and 6*^ joints narrow, subequal, 

 palm very short, finger extremely small. Peraeopods 1 and 2, 5*^ Joint 

 longer than 4'^ or 6*^. Peraeopod 3, 2** Joint acutely produced at lower 

 hind angle. Peraeopods 3 — 5, 4*^ and 5^^ joints subequal, 6*^ much shorteiv 

 Üropod 2, outer ramus about half length of inner, longer than peduncle. 

 üropod 3, inner ramus rather the longer, nearly as long as the elongate 

 peduncle. Telson nearly twice as long as broad, with a row of spinulea 

 along each margin, cleft nearly to middle, with a pair of plumose (auditory) 

 setae near top of cleft, a long spine in each apical notch, of which the 



