330 6. 0. SARS, [N. s. 1v 
The 2 pairs of pleopoda (figs. 8 and 9) exhibit the structure characte- 
ristic of the genus. 
The uropoda (fig. 10) are comparatively still larger than in the female, 
and have the setze of the scape considerably more elongated. The rami ex- 
ceed in length the scape, and the inner one has a very great number of small 
spinules on the inner edge. 
The telson (fig. 11) exhibits the same nearly quadrate form as in the 
female. 
Colour. — The specimens examined were all quite devoid of any colour- 
ing marks, exhibiting a uniform whitish tinge. 
Occurrence. — This pretty species has been stated to occur in 6 different 
Stations, but in most of them only solitary specimens were secured. Of the 
Stations two (St. 48 and 58) are located in the western part of the North 
Caspian Sea; the 3rd (St. 32) about midway between the peninsula Mangy- 
schlak and the opposite western coast; the 4th (St. 16) off the island of 
Swjatoj; the 5th (St. 53) North of the islands of Kulaly and Morskoj; and 
the 6th (St. 61) in the most northern part of the Caspian Sea, at some 
distance south of the Bay Bogatyj Kultuk. 
9. Pseudocuma eudorelloides, G. Ο. Sars, n. sp. 
(Pl. XII, figs. 1—10). 
Specific Characteristics 9. — Body not nearly so slender as in the last 
described species, and having the anterior division less sharply marked off 
from the posterior, and of a somewhat club-shaped form. Carapace not very 
large, but rather deep, with the branchial regions well defined, and sharply 
marked off from the gastric area; the latter with 2 slight longitudinal keels, 
and having the ocular lobe very short and broad, with only 2 small corneæ 
placed far apart; pseudo-rostral projection short and obtuse, being cleft by a 
deep incision in front, as in P. bilamellata ; antero-lateral corners nearly rect- 
angular. Exposed part of trunk evenly vaulted above, without any keel or pro- 
jections. Metasome of moderate length, scarcely exceeding that of the anterior 
division of the body. Antenne, oral parts and legs somewhat resembling 
those parts in P. bilamellata. Uropoda not very large, with the inner ramus 
shorter than the outer, and having inside only 5 small spinules, outer ramus 
about the length of the scape. Telson nearly semicircular in form, the edge 
being divided into a few dentiform projections. Length of adult female 
 Scarcely attaining 5 mm. 
Remarks. — The present form bears a perplexing resemblance in its 
outward appearance to the species of the genus Eudorella, or perhaps still 
more to those of the genus Eudorellopsis. It is however a true Pseudocuma, 
Mélanges biologiques. T. XIII, p. 494. : 
