Niphargoides, Phreatoganimarus 453 



scattered and simple, 2'^ Joint not much shorter than inner ramus. wMch has 

 2 apical spines. Telson rather small, lobes strongly divergent, each with 1 

 apical spinule. L. 10 mm. 



Caspian Sea. Depth 15 — 37 m. 



6. N. aequimanus 0. Sars 1895 N. a.. X. aeqvimaniis, G. O. Sars in: Bull. 

 Ac. St.-Petersb., ser. 5 r. 3 p. 285; t. 18 f. 14— 23^ 



Kesembling N. quadrimanus. Lateral lobes of liead narrowly rounded. 

 Side-plate 1 distally widened. Antenna 1, flagellum 7-jointed, accessoiy flagellum 

 5-jointed; antenna 2, flagellum 7-jointed. Gnathopods 1 and 2 nearly equal, 

 as well as similar, 6*'^ Joint oblong quadrangnlar, palm nearly ti'ansverse, 

 much shorter tlian bind margiii. Peraeopods 8 and 5, 2^ Joint almost as broad 

 as long, tbe setae on bind margin in peraeopod 5 fewer tlian in N. quadrimanus. 

 Uropods 1 and 2 witbout the lateral spine; uropod 3 with more elongate 

 ramus, thrice as long as peduncle, inner ramus with 1 apical spine. Telson 

 with broader lobes, not divergent, 2 unequal spinules on each apex. L. 5 mm. 



Caspian Sea. Depth 19 ni. 



7. N. borodini O. Sars 1897 N. h., G. O. Sars in: Annuaire JIiis. St.-Petersb.,' 

 f. 2 p.290 t. 15 f. 4-9. 



9 . Body somewhat elongated, back broadly rounded, quite sraooth. 

 Head, lateral corners produced, nan'owly rounded. Side-plates 1 — 4 com- 

 paratively large, P* not distally widened, 4*^ deeper than wide. Pleou Seg- 

 ment 3, postero- lateral corners subquadrate, with no obli({ue row of setules. 

 Eyes not very hirge, oval reniforra, dark. Antenna 1. 1^* Joint very large, 

 twice as long as 2*^ tmd 3*^ combined, distally ratber narrowed, flagellum 

 not half as long as peduncle, 8-jointed, accessory flagellum 6-jointed. 

 Antenna 2 as long as antenna 1, antepenultimate and penultimate joints 

 of peduncle with setiferous lobes, ultimate Joint linear, nearly as long as tbe 

 9-joiuted flagellum. Gnathopods 1 and 2 sti'ong, 3*^ — 5*^ joints short, H*^'' large, 

 tending to quadrate in form, but widening distally to a somewhat oblique palm, 

 defined by a spiniferous obtuse point; band, palm, and finger considerably 

 larger in gnathopod 2 than in gnathopod 1. Peraeopods 1 — 5 and uropods 1 

 and 2 as in N. quadrimanus. Uropod 3 projecting much beyond the others, outer 

 ramus more than twice as long as peduncle, 1^* Joint spinöse, 2^ longer than the 

 scale-like inner ramus, setose all round, inner ramus with 3 apical spines. 

 Telson with oblong oval lobes, scarcely divergent, each with 3 spinules on 

 blunt apex. L. 13 mm. — <3 unknown. 



Caspian Sea. 



40. Gen. Phreatogammarus Stebb. 



1899 Phreatogammartis (Sp. typ.: P. fragilis), T. Stebbing in: Tr. ijinn. Soc. 

 London, ser. 2 ». 7 p. 427. 



Near to Gammarus (p. 460). Witbout eyes. üppei: lip broader than 

 deep. Mandible, 1^* Joint of palp not very short. Gnathopods 1 and 2 

 equal. Peraeopods 1 and 2 mucli shorter than peraeopod 3, peraeopod 5 the 

 longest, with its 6*^» Joint longer than any of the other joints. uropod 3 

 long, with equal 1-jointed cylindrical rami. 



1 species. 



