195 



slightly curved; carpal joint in both pairs comparatively short, scarcely 

 longer than the two preceding joints combined, and very obli(]uely truncated 

 at the tip, dactylus very strong and recurved. Last pair of pereiopoda with 

 the basal joint oblong quadrangular, not tapering distally, posterior expan- 

 sion densely setous, and forming below, a broadly rounded setiferous lobe, 

 reaching about to the middle of the meral joint, the latter scarcely longer 

 than the carpal one, which is shorter than tlie propodal and terminal joints 

 combined. Last pair of uropoda with the inner ramus shorter than the outer 

 and provided, in addition to the seta?, with 2 very strong denticles. Telson 

 small, subtriangular, about as long as it is broad at the base, and gradually 

 tapering distally, cleft very narrow, fissure-like, and extending about to the 

 middle, its edges bordered by several slender bristles, the outer of which 

 are very long. Colour greyish white, with brownish intestine shining through 

 the integuments. Length of adult female 13 mm. 



EcDKirJif. — This species established by Boeck, is easily distinguishable 

 from the preceding one by its much more slender form of body, and espe- 

 cially by the peculiar ornamentation of the back with fascicles of slender erect 

 setae. The absolute want of any corneal lenses, and the rather different 

 structure of the last pair of pereiopoda, are also easily recognizable charac- 

 teristics by which the present species may be distinguished from H. fnhicola. 



Occurrence. — The species is a true deep water form, occurring only 

 in depths varying from 100 to 300 fathoms. I have met with it in several 

 places, both off the south and west coasts of Norway, and northwards to the 

 Lofoten Isles. Boeck first detected it in the Bergensfjord. 



Distribution. — Greenland (Hansen), the Kara Sea (Stuxberg) ; Iceland, 

 the Barents Sea, Beeren Eiland, Spitsbergen (Norw. North Atlant. Exp.) 



23. Haploops robusta, G. O. Sars, n. sp. 



.(PI. 68, fig. 2). 



Body rather robust, with broadly vaulted back, and provided with 

 similar dorsal fascicles of slender setae as in H. .sclosa. Cephalon about tlie 

 length of the 2 first segments of mesosome combined, front obtusely truncated, 

 the inferior corners evenly rounded. First pair of eoxal plates rather 

 expanded distally, the succeeding pairs about as in H. setosa. Last pair of 

 epimeral plates of metasome not produced at the lateral corners, posterior 

 edge rather curved. First segment of urosome with a similar hump-shaped 

 dorsal prominence as in H. srfom. Corneal lenses quite wanting. Antennse 

 mucli shorter and stouter than in the preceding species, the peduncle of the 



