CRUSTACEA CASPU. 219 



and nearly hidden between the spines issuing from the tip of the proximal 

 joint. 



The telson (tig'. 1 4) is comparatively small, being scarcely as long as it 

 is broad at the base. It is, as usual, divided by a deep cleft into 2 halves, 

 each of which is somewhat narrowed in its outer part and armed with a 

 single small apical spine accompanied by a pair of simple hairs. 



The adult male (fig. 1 5) is generally somewhat larger than the female, 

 reaching a length of about 1 G mm. The body does not differ much in its 

 general form from that in the female, except in being somewhat more com- 

 pressed, and having the coxal plates less deep. 



The antennae are, as usual, somewhat more fully developed than in the 

 female, and especially the inferior ones more strongly built and generally 

 also more densely setiferous. The accessory appendage of the superior ones 

 (fig. 1 6) appears more elongated and is composed of a greater number of 

 articulations amounting to 9 in all. 



The gnathopoda are still more unequally developed than in the female, 

 the anterior ones (fig. 1 7) chiefly differing from those in the latter by the 

 propodos being somewhat more elongated. The posterior gnathopoda (fig. 18), 

 on the other hand, are of quite an unusual size, the propodos being exceed- 

 ingly large, nearly occupying the half length of the leg. It is of a somewhat 

 obpyriform shape, being not fully twice as long as it is broad, and, as in 

 the female, has the palm rather oblique and quite straight, without any 

 lateral spine in the middle. The hind margin is in some specimens very 

 densely setous, and the dactylus is strong and curved. 



The pereiopoda are perhaps a little more slender than in the female, 

 and the basal joint of the 3 posterior pairs somewhat narrower. 



The last paii* of uropoda (see fig. 1 5) are, as usual, more fully developed 

 than in the female, attaining about the length of the urosome, and have the 

 marginal setae of the outer ramus longer and more coarsely ciliated. 



The telson (fig. 20) is of the very same shape as in the female; but 

 generally 2, instead of a single spine, are found on the tip of each of the 

 terminal lobes. 



Colour. -:- According to Eichwald, the body, in the living state of the 

 animal, exhibits a brownish green colour, the posterior edges of the seg- 

 ments being on each side tinged with pink. 



Occurrence. — This form has been collected by Mr. "Warpachowsky 

 in 7 different Stations of the North Caspian Sea, but in none of the Stations 

 it would, seem to have occurred in any abundance. Of the Stations 2 (St. 1 6 

 and 17) are located off the island Swjatoj, a third (St, 24) between the 

 islands Kulaly and Morskoy, 2 others (St. 31 and 32) about midway be- 



