Photis, Haplocheira 609 



projecting angle, to wbich tbe apex of tinger reaches. Gnathopod 2 in d, 

 2^ Joint with rouuded lobe at lower front corner, 5*^ Joint broadly cup- 

 fihaped, 6*^ veiy large, palm oblique, much longer than bind margin, defined 

 by a strongly projecting triangulär lobe, minutely crenulate and bisinuate, 

 witb 2 angular projections, finger strong, impinging within tbe sinus adjacent 

 to defining process. Gnathopod 1 in Q , ö*'^ Joint slender, longer than tbe 

 oval 6*^. Gnathopod 2 in 9 stouter, 5^^ Joint short, cup-shaped, 6*^ stout, 

 palm oblique, defined by an obtuse angle. Peraeopods 1 — 5 nearly as in 

 P. longicaudata, but 5*^ less elongated. üropod 3, outer ramus longer than 

 peduncle, 2*^ Joint tipped with slender setae. Telson extremely small, nearly 

 twice as broad as long, with projection on each side of apex. Colour whitish 

 grey, with slightly darker hue on side-plates. L. scarcely 4 mm. 



Arctic Ocean and North- Atlantic (Greenland; Norway, depth 56 — 75 m). 



P. producta (Stimps.) 1855 Dercothoe? produdus, Stimpson in: P. Ac. Philad., 

 «. 7 p. 382 I 1893 Fhotis rdnJiardi (part.)?, A. Della Valle in : F. Fl. Neapel, v. 20 p.397. 



Gnathopods 1 and 2 aubequal, 6tli Joint oblong. L. 16 mm. 



North-Pacific (Tanegasima). 



3. Gen. Haplocheira Hasw. 



1879 Haplocheira (Sp. un.: H. typica), Haswell in: P. Linn. Soc. N. S. Wales, 

 vA p. 273 i 1885 H., Haswell in: P. Linn. Soc. N. S. Wales, «.10 p. 106 | 1888 H., 

 T. Stebbing in: Rep. Voy. Challenger, v. 29 p. 1171 | 1881 Haplochira, E. v. Martens in: 

 '/ioo\. Rec, V. 16 Crust. p. 32. 



Head, lateral lobes not gi'eätly produced. Side-plates of medium depth, 

 5*^ less deep than 4*^, 1^* — 4*^^ with setae on lower margin. Antennae 1 

 and 2 short, subequal, peduncle longer than flagellum. Antenna 1 with 

 accessory flagellum. Upper lip faintly emarginate. Mandible, 3*^ Joint of 

 palp shorter than 2*^. Maxiila 1, inner plate with f ringe of many setae, 

 outer with 9 spines; 2*^ Joint of palp long. Maxilla 2, inner plate fringed 

 along inner margin. Maxillipeds, inner plates rather broad, outer narrow 

 and rather short, palp elongate. Gnathopod 1 (Fig. 104 p. 610) simple or 

 scarcely subchelate. Gnathopod 2 (Fig. 105 p. 610) simple, 5*^ and 6*^ joints 

 long and slender, fringed with very long setae. Peraeopods 3 — 5 robust, 

 not elongate, 2*^ Joint well expanded. üropods 1 — 3 rather stout, spinöse, 

 peduncle produced to a long spine-like process. Uropod 3 short, peduncle 

 stout, inner ramus minute, much shorter than outer. Telson with hook at 

 each distal angle. 



1 species. 



1 . H. barbimana (G. M. Thoms.) 1879 Gammarus barbimanus, G. M. Thomson 

 in: Tr. N. Zealand Inst., u 11 p. 241 t. lOD f . 1 | 1886 Corophium barbivianum, G. M. 

 Thomson & Chilton in: Tr. N. Zealand Inst., ul8 p. 143 | 1893 Leptocheirus barbimanus, 

 A. Della V'alle in: F. Fl. Neapel, ».20 p.433 t. 57 f. 4, 5 | 1879 Haplocheira typica, 

 Haswell in: P. Linn. Soc. N.S.Wales, vA p.273 1. 11 f. 2 | 1885 H. f., Haswell in: P. 

 Linn. Soc. N. S. Wales, v. 10 p. 106 t. 16 f. 4—8 | 1884 Corophium lendenfeldi, Chilton 

 in: Tr. N. Zealand Inst., u 16 p. 262 t.20f. la— e | 1888 Haplocheira plumosa -\- H. bar- 

 bimanus, T. Stebbing in: Rep. Voy. Challenger, v. 29 p. 1172 t. 126; p. 1177. 



Body not much compressed laterally. Head, lateral lobes rounded or 

 pointed. Pleon segment 3, postero-lateral corners obtusely quadrate. Eyes 

 oval. Antenna 1, 1«' and 2*^ joints subequal, 3* rather over half as long 

 as 2^; flagellum 9 — 12-jointed; accessory flagellum 2 — 5-jointed. Antenna 2 



Das Tierreich. 21. Lief.: T. R. R. Stebbing, Amphipoda I. 39 



