Melphidippa, Melphidippella 337 



4. M. serrata (Stebb.) 1888 Neohela s., T. Stebbing in: Rep. Voy. Challenger, 

 «.29 p. 1215 t. 136 I 1893 .V. s., A. DellaYalle in: F. Fl. Neapel, f. 20 p. 343 | 1894 

 Melphidippa s., (T. Stebbing in:) G. 0. Sars, Crust. Norway, v.l p. 624 ] 1899 M. s., 

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



Pleon Segments 1—5 agTeeing with those of M. borealis, but the 

 1^* also dorsally denticulate and the 3*^ with postero-lateral corners produced 

 into au acute tooth. Head with rostrum produced beyond the narrow lateral 

 corners. In general agreeing with M. borealis, but gnathopod 2 with 6*^ Joint 

 not quite so long as 5*^ and having a rather long, oblique, well excavate 

 palm, and the finger not very small, the telson deeply cleft, with somewhat 

 divergent lobes. Peraeopods 3 — 5, uropods 1 — 3, much of antennae 1 and 2 

 and apices of telson missing. Triturating organs of stomach seemiugly 

 devoid of strong spines. L. 8 mm. 



Cumberland ßay [Kerguelen Island], üepth 239 m. 



2. Gen. Melphidippella 0. Sars 



1871 Melphidii)pa (psirt), A. Boeck in: Forb. Selsk. Christian., 1870 p.218 | 1894 

 Melphidippella (Sp. un. : M. macera), G. O. Sars, Crust. Xorway, v. 1 p. 487. 



Side-plate 1 subquadrate. Eyes well developed. Antenna 1, peduncle 

 not very long, accessory flagellum rudimentary. Antenna 2 shorter than 

 antenna 1 in g , but not in d. Mandible, 3<i Joint of palp much shorter 

 than 2"^. Maxillipeds, palp not elongate. Gnathopod 1, 5**^ Joint scarcely 

 expanded proximally. Peraeopods 1 and 2 extremely slender, finger very 

 Short. Peraeopods 3 — 5. finger reverted. Uropod 3, peduncle elongate, 

 sublaminar, rami subequal. narrowly lanceolate. Telson tiiangular, longer 

 than broad, apices bidentate. 



1 species. 



1. M. macra (Norm.) 1869 Atylus macer, A.M.Norman in: Rep. Brit. Ass., 

 Meet. 38 p. 280 j 1888 AJ m., T. Stebbing in: Rep. Voy. Challenger, ij.29 p.l628 | 1889 

 Melphidippa macra, A. M. Norman in: Ann. nat. Hist., ser. 6 r. 4 p. 121 t. 10 f. 14; t. 12 

 f. 4— 7 i 1893 Ceradocus macer, A. Della Valle in: F. Fl. Neapel, u 20 p. 720 | 1894 

 Melphidippella macera, G. 0. Sars, Crust. Norway, v.l p. 488 t. 171 | 1871 Melphidippa 

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

 Arkt. Amphip., v. 2 p. 414 t. 24 f. 5. 



Peraeon in 9 rather tumid. Pleon segments 1 — 5 each produced 

 dorsally to a tooth, with the bind margin on either side of it finely denti- 

 culate. Head short, but broad and deep, rosti'um small, lateral lobes 

 swoUen and produced to an acute deflexed point. Side-plate 1, lower front 

 Corner minutely produced, 2^ obliquely truncate below, 5**^ in front as deep 

 as 4*^ Pleon segment 3, postero-lateral corners acutely produced, postero- 

 lateral margin minutely serrate. Eyes large, semi-globose, red, on lateral 

 lobes of head. Antenna i long, 1^* Joint thick, subequal to 2^ and 3^ combined, 

 S^ very small, flagellum more than 4 times as long as peduncle, slender, with 

 about 22 joints, accessory flagellum a minute setulose nodule. Antenna 2, 

 penultimate Joint of peduncle longer than ultimate, in ö somewhat laminar, 

 flagellum in Q shorter than peduncle, with about 7 joints, in ö fuUy as 

 long as peduncle, with about 12 joints. Gnathopod 1, 5*^ Joint rather 

 compressed, densely setose on bind margin, narrowin g distally, 6*^ much 

 shorter, naiTOwly fusiform, finger slender. Gnathopod 2 rather longer, 5*^ Joint 



Das Tierreich. 21. Lief.: T. E. R. Stebbing, Amphipoda I. 22 



