621 



slender, the 3 posterior pairs with the the basal joint slightly expanded, and 

 fringed on both edges with strong, ciliated setae. The 2 anterior pairs of 

 uropoda rather stout, with the ranri nearly equal-sized and terminating each 

 with a strong spine; last pair very small, with the basal joint expanded 

 inside to a rather broad lobe, carrying at the outer corner 4 setae and pro- 

 jecting far beyond the terminal joint, the latter extremely minute and tipped 

 with 4 bristles. Telson about as long as it is broad, with a slender spine 

 on each side, tip evenly rounded. Body of a uniform yellowish grey colour, 

 without any pigmentary ornament. Length of adult female 13 mm., of male 

 about the same. 



Eemarlts. This form was first described by Kroyer as Glauconome 

 leucopis from Greenland specimens, and was subsequently also recorded from 

 the Norwegian coast. I have formerly, on the authority of Prof. Sidn. 

 Smith, identified it with Unciola irrorata of Say. Having, however, recently 

 had an opportunity of examining a specimen of the latter form, I find both 

 to be evidently specifically distinct, the North American species differing, 

 among other things, in its well-developed and darkly pigmented eyes, whereas 

 the northern species fully deserves its specific name, the eyes being replaced 

 by patches of an opaque whitish pigment. From the other Norwegian species 

 it is very easily distinguished by its large size and more robust form 

 of body. 



Occurrence. The only place on the Norwegian coast, where I have 

 hitherto met with this form, is in the Varangerfjord, at Vadso, and here it 

 was also previously collected by Dr. Danielsen and my late father. It occurred 

 in depths varying from 90 to 120 fathoms, muddy bottom. 



Distribution. - Arctic Ocean : Greenland (Kreyer), Spitsbergen (Gor-s), 

 the Barents Sea (Hoek), the Kara Sea (Hansen), the Siberian polar Sea 

 (Stuxberg). 



9. Unciola planipes, Norman. 



(PI. 223). 



Unciola planipes, Norman, Report of deep-sea dredging off the coast of Northumberland anil 



Durham, p. 3, PI. VIII, figs. 915. 



Syn.: Glauconome Kr0yeri, Boeck cf. 

 Glauconome Steenstrupi, Boeck 9- 



Body considerably more slender than in the preceding species, with 

 the segments quite smooth above; 2nd segment of mesosome in male with a 



82 Crustacea. 



