452 Niphargoides 



species, the 6^'» joiut beiiig very tiimid at the base, the palm very oblique, well 

 defined, mucli longer thau the bind margin, gnathopod 2 much the larger, 

 with the palmar angle more projecting; finger long, eurved. Uropod 3, 

 outer ramus nearly thrice as long as peduncle, sublaminar, fringed almost 

 all round, 2-^ Joint almost evanescent, inner ramus with 7 plumose setae 

 on inner margin and 2 spines at apex. Telsou with 4 spines at each apex. 

 L. 1 7 mm. 



Korth Caspian Sea. 



4. N. grimmi 0. Sars 189« N. g., G. O. 8ars in: Bull. Ac. St.-Petersb., ser. 5 

 vA p.471 t. 11 f. 1—12. 



Resembling N. caspius (p. 450). Appendages much less hirsute. Body 

 robust, pleon segments 5 and 6 each with 2 dorsal spinules. Head, lateral 

 lobes narrowly rounded. Side-plates 1—4 fringed with rather short setae. Pleon 

 Segment 2, postero-lateral eorners quadrate, segment 3, postero-lateral corners 

 acutely produced, with a few setules on the margin. Antenna 1, flagellum 

 5-jointed. accessory flagellum 2-jointed, the 2^ Joint minute. Antenna 2 

 not longer, flagellum 3-jointed. Gnathopods 1 and 2, 6**» Joint rather elongate, 

 oblong, slightly widening to the palm, which is not veiy oblique, well defined, 

 with 2 palmar spines, one of them very long; gnathopod 2 nearly twice 

 as large as gnathopod 1. Peraeopod 3, 2*^ Joint piriform. Peraeopod 4, 

 2^ Joint little widened, bind margin sinuous. Peraeopod 5, 2*^ Joint greatly 

 expanded, little longer than broad, widest at about the middle, fringed 

 behind with hair-like setules. üropod 3, outer ramus with fringing setae 

 not dose set, 2"^ Joint very small, but well defined and obvious, inner ramus 

 nearly as long as peduncle, tipped with 2 spines. Telson rather longer 

 than broad, lobes little divergent, 4 spines on each apex. L. 8 mm. 



Caspian Sea. Deptli 47 — 169 m. 



5. N. quadrimanus O. Sars 1895 N. q., N. qvadrimmms, G. 0. Sars in: Bull. 

 Ac. St.-Petersb., ser. 5 v.'d p. 281; t. 18 f. 1—13. 



Body not very robust, somewhat compressed, pleon devoid of subdorsal 

 spinules. Head, lateral lobes broadly rounded. Side-plate 1 scarcely expanded 

 distally, 4^'^ about as wide as deep. Pleon segment 3, postero-lateral corners 

 quadrate, with no oblique row of setules. FJyes rather small, oval reniform, dark. 

 Antenna 1. 1^^ Joint twice as long as 2<^ and 3^ combined, 2*^ twice as long as 3*^, 

 flagellum about 11-jointed, accessory flagellum 6-jointed. Antenna 2 equal to 

 antenna 1, peduncle geniculate between antepenultimate and penultimate joints, 

 both of which are expanded below to setiferous lobes, ultimate Joint nearly as 

 long as penultimate, both spiniferous, flagellum 10-jointed. Gnathopods 1 

 and 2, G*** Joint oblong quadrangulai-, palm not very oblique, defined by a 

 distinct angle armed with 3 unequal spines; in gnathopod 1 the band inclines 

 to oval, but in the larger gnathopod 2 its great breadth, encreasing slightly 

 towards the palm, gives it au almost Square appearance. Peraeopods 1 and 2, 

 4*^ Joint large, setiferous chiefly on bind margin, 5*^ Joint not mucli expanded, 

 6*^, as usual in the genus, linear. Peraeopod 3, 2^ Joint regularly oval. 

 Peraeopod 4, 2^ Joint much longer, and below narrower, bind margin sinuous. 

 Peraeopod 5, 2^ Joint gi'eatly expanded, greatest width near distal end, bind 

 margin fringed with short setae, lower front angle and 4*^ and 5*^ joints, 

 as in peraeopod 4, very hirsute. Uropods 1 and 2, , rami subequal, each with 

 5 apical spines and one lateral spine. üropod 3 projecting far beyond the 

 others, outer ramus with 2 sets of spines on outer margin, fringing setae 



