532 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



whence the species was described by M. Sars; off Storeggen, 400 

 fathoms (G. O. Sars), and northward among the Loffoden Islands, 250 

 fathoms ; the coast of Fininark, Spitzbergen (Buchholz), and the Arctic 

 Ocean about Nova Zernbla (G. O. Sars.) 



Eurycope G. O. Sars. 

 Eurycope G. O. Sars, Chr. Vid. Selsk. Forli., 1863, p. 208, 1864. 



Body depressed, subovate as seen from above ; about equally atten- 

 uated before and behind. Head of medium size, more or less produced 

 between the antennuhe ; antenna very slender, two to four times as long 

 as the body; flagelluin longer than the peduncle; mandibles robust, 

 quadridentate at the apex, and bearing below a series of rigid setae 

 and a strong molar process ; mandibular palpus well developed, with 

 the terminal segment enlarged at its base and curved. Four anterior 

 thoracic segments subequal, short; three posterior segments large not 

 suddenly narrower than the anterior segments ; the first pair of legs 

 shorter than the next three, with the dactylus short ; the next three 

 pairs elongated, and with elongated and slender dactyli ; three posterior 

 pairs of legs distinctly natatory, with the carpus and propodus strongly 

 flattened and provided with numerous plumose marginal seta3; dactylus 

 of the ordinary form. Pleon rather large, broader than long, obtusely 

 rounded behind ; operculum subpentagonal with rounded angles, much 

 smaller than the pleon. Uropods short, biramous, rami uniarticulate. 

 Dorsal surface of the body smooth and shining. 



For the characterization of the genus, as given above, I have de- 

 pended largely upon the work of G. O. Sars, having had myself, for ex- 

 amination, only the following species : 



Eurycope robusta Harger. 



Eurycope robusta Harger, Am. Jour. Sci., Ill, vol. xv, p. 375, 1878 ; Proc. U. S. 

 Nat. Mus., 1879, vol. ii, p. 159, 1879. 



PLATE III, FIG. 15. 



This species may be recognized by the flattened and ciliated swim- 

 ming legs, in three pairs, on the last three thoracic segments, which 

 are not, as in the preceding species, suddenly of much less diameter 

 than the anterior four segments. 



Body oval with the length equal to, or slightly exceeding, twice the 

 breadth. Head, behind the bases of the antennulre, longer than the first 

 thoracic segment, produced medially into a short rostrum about half as 

 long as the basal antennular segment. Antennuloe (pi. Ill, fig. 15 a) 

 attaining the middle of the fourth segment of the antennae in the females, 

 surpassing the middle of this segment in the males ; basal segment sub- 

 quadrate, spinulose at the distal angles, somewhat narrowed from the 

 base, bearing the second much smaller segment a little beyond the middle 



