41 



obtusely rounded. The first 3 segments of mesosome combined somewhat exceed- 

 ing in length the 4th segment, which is about the same size as the 5th, both being 

 almost twice as broad as they are long; last segment, as usual, considerably 

 smaller. Metasome about the length of the last 2 segments of the mesosome 

 combined, and distinctly narrowed distally. Eyes present, but very small, puncti- 

 form, occurring on the sides of the cephalosome, at some distance from the frontal 

 margin. Superior antennae with the last 2 joints of about equal length, and 

 combined, not quite attaining the length of the basal one. Ohelipeds very strong, 

 hand oblong oval, not attaining twice the length of the carpus, fingers shorter 

 than the palm, and not forcipate. Pereiopoda resembling in structure those in 

 the preceding species, though perhaps somewhat less slender; carpal spine of the 

 5 posterior pairs comparatively larger, and more conspicuously cultriform. Pleo- 

 poda (in female) wholly wanting. Uropoda of about same appearance as in 

 P. foreipatus. Length of female 1.55 mm. 



Remarks. — Though rather nearly allied to the 2n'eceding species, the 

 present form may be easily distinguished by the somewhat different form of the 

 cephalosome, the presence of distinct, though very small eyes, and by the cheli- 

 peds not being forcipate. 



Occurrence. — The only place where I have observed this form, is in the 

 Varanger Fjord at Vadso. It occurred here rather sparingly in a depth of 100 — 

 120 fathoms. Out of Norway, it has not yet been recorded. 



3. Pseudotanais maeroeheles, G. 0. Sars. 



(PI. XVIII.) 

 Pseudotanais maeroeheles, G. 0. Sars, 1. c. p. 47. 



Specific Characters. — 9- Body very short and compact, scarcely more 

 than 3 times as long as it is broad. Cephalosome scarcely exceeding in length 

 the 3 anterior segments of mesosome combined, and strongly contracted in front, 

 tip narrowly truncated. Free segments of mesosome about as in the 2 preceding 

 species. Metasome gradually narrowed distally, with the terminal segment evenly 

 rounded at the tip. Eyes wholly absent. Superior antenna3 very slender, consider- 

 ably exceeding the cephalosome in length, last joint longer than the 2nd, and 

 both combined, about the length of the basal one. Chelipeds exceedingly large, 

 attaining nearly half the length of the body, hand very much elongated, with the 

 fingers slender and narrow, considerably exceeding the palm in length, but not 

 forcipate. Pereiopoda rather slender, 1st pair with the propodal joint longer than 

 the 2 preceding joints combined, and conically tapered, dactylus long and seti- 



