318 G. 0. SARS, [n. S. IV 



The free segments of the mesosome are considerably narrower than in the 

 female, and have the epimera very distinctly defined, and expanded laterally. 



The eye is unusually large, with the cornese very fully developed and 

 highly refractive. 



The superior antennse (fig. 3), as usual in male specimens, differ from 

 those in the female, chiefly in the greater number of articulations in the 

 flagella. 



The inferior antennae (fig. 4) exhibit the usual strong development, and 

 are nearly equal in length to the whole body. 



The 4 anterior pairs of legs (figs. 5, 6, 7) have the basal joint much 

 larger than in the female, and considerably expanded, in order to receive 

 the strong muscles moving the largely developed exopodite. The outer joints 

 of the 2nd pair (fig. 6) do not, in this species, differ in structure from those 

 in the female. 



The 2 pairs of pleopoda (figs. 8 — 9) exhibit the structure characteristic 

 of the genus. 



The uropoda (see fig. 10) appear comparatively more slender than in the 

 female, and both the scape and the inner ramus have the inner edge finely 

 ciliated between the marginal spines. The number of the latter is on the 

 scape 5, on the inner ramus 9. 



The telson (ibid.) does not differ in its appearance from that in the 

 female. 



Colour. — In some of the specimens the anterior part of the body ex- 

 hibited a pronounced yellowish tinge, but no trace of any distinctly defined, 

 stellate, pigmentary spots could be detected. 



Occurrence. — Several specimens of this form, both males and females, 

 were collected by Mr. Warpachowsky at Stat. 27 and 52, the former 

 located between the islands of Kulaly and Morskoj, the latter somewhat 

 more south, off the island of Podgornyi. Solitary specimens have moreover 

 been taken in 3 other Stations (17, 49 and 53), all lying in about the 

 same tract cf the Caspian Sea, north of the peninsula Mangyschlak. 



5. Pseudocuma gracilis, G. 0. Sars, n. sp. 



(PI. VII). 



Specific Characteristics. — Body extremely slender and elongated, with 

 rather thin and semipellucid integuments, and the anterior division narrow 

 oblong in form. Carapace comparatively small, scarcely as long as the exposed 

 part of the trunk, and having the branchial regions but little swollen ; pseudo- 

 rostral projection comparatively short and obtuse at the tip, antero-lateral 

 corners but little projecting and obtusangular. Free segments of mesosome 



Melanges biologiqnos. T. XIII, p. 482. 



