(XXXVI) | CRUSTACEA CASPIA. 321 
of the 2nd pair (fig. 13) is armed at the tip with small recurved hooks, 
3 in number. 
The 2 pairs of pleopoda (figs. 15 and 16) do not differ in their structure 
from those in the males of the other species of the genus. 
The uropoda (fig. 17) have the rami somewhat more elongated than in 
the female, and the inner ramus moreover differs in its inner edge being 
finely ciliated between the marginal spines, which are 9 in number. The 
telson exhibits a form similar to that in the female. 
Colour. — All the specimens which I have examined, were of a uniform 
whitish colour, without any trace of pigmentary ornament. 
Occurrence. — Numerous specimens of this form were collected by Mr. 
Warpachowsky at Stat. 2 in the western part of the North Caspian Sea, 
south of the Tschistyi-Bank. 
The same species also occurred occasionally in 4 other Stations, 2 of 
which (48 and 50) likewise belonged to the western part of the North Cas- 
pian Sea, whereas the other 2 (49 and 51) were located between the islands 
of Kulaly and Morskoj, north of the peninsula Mangyschlak. 
6. Pseudocuma graciloides, G. O. Sars, n. sp. 
(Pl. VIII). 
Specific Characteristics. — Very like the last described species, but compa- 
ratively more strongly built, the anterior division being oblong oval in form 
and somewhat vaulted above. Carapace comparatively larger, exceeding in 
length the exposed part of the trunk, and having the branchial regions more 
distinctly defined; pseudo-rostral projection rather prominent and acuminate; 
antero-lateral corners obtusangular. Metasome rather slender, exceeding in 
length the anterior division of the body. Eye well developed and very large 
in the male. Antenne, oral parts and legs nearly as in P. gracilis. Uropoda 
rather slender and elongated, with the rami equal-sized and much attenuated, 
the inner one in female armed inside with a row of 6 comparatively very 
small spinules, the outer one having only a single spinule on the inner edge 
near the tip. Telson small, semi-elliptical. Length of adult female 6 mm., of 
male about the same. 
Remarks. — As indicated by the specific name, this form is very nearly 
allied to P. gracilis, with which it may easily be confounded. On a closer 
examination, it is however distinguished by a somewhat less slender form of 
the body, and by the comparatively larger size of the carapace, the pseudo- 
rostral projection of which is also more prominent and acute. 
Melanges biologiques. T. XIII, p. 485. 
