284 G. 0. SARS, 



joiut is, as usual, narrow linear, and is armed in its outer part posteriorly 

 with a double row of slender spines. 



The 3 posterior pairs of pereiopoda (figs. 7 — 9) are rather elongated 

 and generally strongly reflexed. They have the outer part densely setiferous 

 and besides provided with fascicles of slender spines. The antepenultimate 

 pair (fig. 7) are, as usual, somewhat shorter than the other 2, and have the 

 basal joint regularly oval inform, with from 4 to 5 fascicles of slender bristles 

 anteriorly. The meral joint of this pair is rather broad, its posterior edge 

 bulging considerably in the middle. In the penultimate pair (fig. 8) the 

 basal joint is comparatively narrower and more elongated, with tlie posterior 

 edge slightly sinuated below the middle. The last pair (fig. 9) are dis- 

 tinguished by the large size of the basal joiut, which forms posteriorly a 

 very broad lamellar expansion, the edges of which are somewhat irregularly 

 curved and tliroughout fringed with short bristles. Anteriorly this joint 

 terminates in an obtuse corner very densely clothed with slender bristles. 

 The outer joints of these legs exhibit a similar longitudinal relation as in 

 the 3 preceding species. 



The 2 anterior pairs of uropoda (figs. 10 — 11 ) are rather strongly built, 

 with the rami subequal and armed with 5 strong apical spines and a single 

 lateral one. 



The last pair of uropoda (fig. 1 2) are considerably more elongated than 

 in the 3 preceding species, projecting far beyond the other pairs. The basal 

 joint is rather short and armed at the end below with a transverse row of 5 

 not very elongated spines. The outer ramus is fully twice as long as the 

 basal part and rather narrow, with only scattered simple bristles and 2 

 fascicles of spines on the outer edge. The terminal joint of this ramus is 

 well defined and about % as long as the proximal one, terminating in an 

 obtuse setiferous point. The inner ramus is small and scale-like, with 2 

 apical spines. 



The telsou (fig. 13) is comparatively small, and has the lateral lobes 

 strongly diverging, each armed with only a single apical spinule. 



The male does not differ from the female except by the anterior pairs 

 of coxal plates being somewhat smaller. On the other hand, neither in the 

 structure of the antenna? nor in that of tlie gnathopoda or caudal appendages 

 are there any differences to be detected, and this is probably the case with 

 all the species belonging to this genus. 



Occurrence. — Of this species solitary specimens were collected by Mr. 

 Warpachowsky at 3 different Stations of the North Caspian Sea, the one 

 (St. 58) located in the western part of that basin, north of the Tschistyi 

 Bank, the 2nd (St. Gl) occurring far north, at some distance outside the 



4'D3.-MaT. CTp. 192. 10 



