^4 Protomedeia, Xenocheira 



Pleon Segment 3, postero-lateral coruers rotundo-ciuadrate. Eyes very small, 

 rounded oval, black. Autenna 1 scarcely over half as long as body; 8<^ joiut 

 about half as long as P* or 2'*; flagellura much louger than peduücle, about 

 14-jointed (Sars) (Schneider: 22-jointed); accessory flagellum 5— 7-jointed. 

 Autenna 2, ultimate Joint of peduncle subequal to penultimate or flagellum, the 

 latter 6- or 7-joiuted. Upper lip with apex eutire (indentediu Sars, figure). Gnatho- 

 pod 1 iu d, 2*^ Joint cüstally widened, 5*^ rather longer than 6^^, which is 

 oblong oval, with short rounded palm overlapped by small finger. Gnatho- 

 pod 2 in d, 5*^ Joint very broad, longer than broad, distally truncate; 

 6*^ narrower and shorter, yet broadly oval, with strongly serrate bind margin 

 and palm; finger rather strong. Gnathopod 1 in 9, 2*^ Joint not expanded 

 •distally; 5*^1 Joint scarcely longer than 6^^. Gnathopod 2 in 9, 2*^ Joint long, 

 elender, fringed on both margins with long plumose setae, 6**^ Joint rather 

 longer than 5**», slightly tapering, palm very short, finger small. Peraeo- 

 pods 1 and 2, 4*^ Joint about as long as 5^'^ and 6*^ combined and much 

 wider, in peraeopod 1 this and the 2^ Joint densely setose; finger as long 

 as 6**^ Joint or longer. Peraeopods 3 — 5, 2*^ Joint oblong oval, narrowing 

 a little downward. üropod 3, inner ramus the shorter, both spinöse, outer 

 also tipped with a slender seta. Telson about as broad as long, having on 

 either side of the broadly rounded apical margin a little spine-like hook 

 and 2 or 3 slender spines. Colour whitish with straight brown bands crossing 

 the Segments and corresponding blotches on side-plates. L. 8 mm, 



Arctic Ocean, Xorth-Atlantic, North-Sea, Skagerrak and Kattegat (Greenland, 

 Spitzbergen, Iceland, Finmark [Norway], Sweden, Denmark). Depth 11 — 73 m. 



9. Gen. Xenocheira Hasw. 



1879 Xenocheira (Sp. un.: X. fasciata), Haswell in: P. Linn. Soc. N. S. Wales, 

 «7.4 p.272 I 1893, A. DellaValle in: F. Fl. Neapel, ».20 p. 433, 948 | 1881 Xenochira, 

 E. V. Martens in: Zool. Kec, v. 16 Orust. p. 31. 



Side-plates all shallow. Antenna 1 much the longer, 3^ Joint not 

 elongate; with accessory flagellum. Maxillipeds described as non-unguiculate 

 (palp 3-joiuted). Gnathopod 1 subchelate. Gnathopod 2 simple, the 5*^ Joint 

 broadly expanded in front of the neighbouiing joints, and described as arti- 

 culating at its base with the 3^ Joint. Gnathopods 1 and 2 both setose. 



1 species. 



1. X. fasciata Hasw. 1879 X. f., Haswell in: P. Linn. Soc. N. S. Wales, vA 

 p. 272 t. 11 f. 6 I 1885 X/:, Haswell in: P. Linn. Soc. N. S.Wales, tJ.lO p.l05 1. 16 f. 1— 3. 



Body slender, perhaps subdepressed ; pleon segment 3 the longest 

 Head, lateral lobes scarcely prominent. Side-plates 1 — 4 small, 6^^ (in 

 figure) nearly as deep, broader. Eyes round. Antenna 1 more than half 

 as long as body, 1«* Joint rather longer than head, 2^ a little longer than 1»*, 

 3^ about V3 as long as 2'^; flagellum longer than peduncle. Antenna 2 with longer 

 peduncle; ultimate Joint of peduncle shorter than penultimate, longer than 

 the 9-jointed flagellum. Maxillipeds, outer plates and palp with a close 

 fringe of long hairs. Gnathopod 1, 5**^ Joint short, triangulär, masked behind 

 by the triangulär 4*^; 6**» twice as long as 5*^ narrow, convex in front, 

 with straight bind margin; finger (in figure, 1885) smooth, small, but over- 

 lappingthe short, almost transverse palm. Gnathopod 2, 3^ Joint subtriangular, 

 articulating with both 4*^ and o^^, 5*^ with a broad free distal mai-gin. 



