370 0. 0. SARS, 



tively short, and tlie dactylus veiy strong. The basal joint of the ante- 

 penultimate pair (fig. 7) is of a somewhat unusual form, being Mot at all 

 produced at the infero-posteal corner, but of nearly the same sha;^e as that 

 • of the penultimate pair (fig. 8), though somewhat shorter. In both oairs this 

 joint is densely fringed posteriorly witli short setw, and has antei'iorly 

 several fascicles of slender bristles. The last pair (fig. 9) have the lasal joint 

 very large and expanded, widening distally and forming at the infei o-posteal 

 corner a broadly rounded lobe. The posterior edge of the joint is t' roughout 

 fringed with numerous rather slender and elongated setiE, and the anterior 

 edge is also rather richly supplied with bristles arranged in sev al dense 

 fascicles. 



The 2 anterior pairs of uropoda (comp. figs. 16, 17) have the I'ami quite 

 smooth, except at the tip, which is armed with a strong spine accompanied 

 by 2 much smaller ones. 



The last ])air of uropoda (fig. 10) are unusually short and stout, but 

 reaching little beyond the others. The basal ])art is rather thick and massive, 

 being armed at the end below with several spines. The inner ramus exhibits 

 the usual scale-like a])pearance, and carries a single small apical spine. The 

 outer ramus is scarcely longer than the basal part, and provided in its outer 

 part with a number of long ciliated setai and with 2 spines on the outer 

 edge. The terminal joint is so extremely minute as readily to escape attention. 



The telson (fig. 11) is sliort and broad, being, as usual, divided by a 

 deep and narrow cleft into two halves, each of which carries, at the narrowly 

 truncated tip, a single spine accompanied by 2 small hairs. 



The adult male (fig. 12) is somewhat larger than the female, measuring 

 in length about 9 mm., and exhibits a similar short and compact form of 

 the body. 



In the specimen examined, the accessory appendage of the superior 

 antennae (fig. 13) was somewhat more fully developed than in the female, 

 being composed of 4 articulations. It did not, however, much exceed the last 

 peduncular joint in length. 



The gnathopoda (figs. 14, 15) are, as usual, more strongly built than in 

 the female, though the difference in this point is not as great as in most 

 other species. The propodos in both pairs is oblong oval in form and in the 

 posterior pair somewhat larger than in the anterior, the palm being in both 

 somewhat more oblique than in the female. 



The last pair of uropoda (fig. 1 8) are scarcely larger than in the latter 

 but of a similar structure. 



Occurrence. — Solitary specimens of this form were collected by Mr. 

 Warpachowsky in 3 different Stations of the North Caspian Sea, the 1st 



*il-5.-5IaT. OTp. .■!50. 28 



