145 



narrowly rounded at the lateral corners, posterior edge slightly arched. Eves 

 imperfectly developed, consisting of an irregular mass of whitish pigment 

 without any trace of visual elements. Superior antennae with the 1st joint 

 of the peduncle about the length of the other 2 combined, Hagellum a litt It- 

 shorter than the peduncle, and consisting of 6 articulations, accessory appen- 

 dage slightly exceeding half the length of the nagellum, and 4-articulate. 

 Inferior antenna? in female considerably longer than the superior, penultimate 

 joint of the peduncle rather large, oblong oval, with 3 transverse rows of 

 spines, and a few slender and simple setae, fiagellum about the length of the 

 2 outer joints of the peduncle combined and 6-artic.ulate ; those of male nearly 

 attaining the length of the body, joints of the peduncle densely hairy in front, 

 nagellum, very slender. Gnathopoda not very powerful, the posterior ones 

 only slightly larger than the anterior, hand in both oblong oval, somewhat 

 dilated distally, palmar edge shorter than the hind margin. Antepenultimate 

 pair of pereiopoda with the basal joint moderately expanded, and broadest 

 in its proximal part; penultimate pair about half the length of the body; 

 last pair with the basal joint very large and broad, about as long as the 

 remaining part of the leg, posterior edge strongly curved and finely serrated. 

 Last pair of uropoda in female with the inner ramus scarcely exceeding half 

 the length of the outer, mucroniform and quite naked; those in male with 

 the rami nearly equal-sized, narrow lanceolate and fringed with long ciliated 

 sets?. Lobes of telson rather narrow and but slightly attenuated distally, 

 each with 2 small spines and a little bristle on the obtusely rounded tip. 

 Colour light buff, changing to orange, with opaque whitish shadows. Length 

 of adulte female 7mm, of male about the same. 



Remarks. The above described species, the type of the genus as 

 here restricted, is easily known from the two Challenger species, as also from 

 that characterised by Dr. Chevreux, by the imperfectly developed eyes and 

 by the less powerful gnathopoda. The Phoxus Kroyeri of Stimpson is un- 

 doubtedly this species. 



Occurrence. - The species would seem to be a genuine arctic form, 

 occurring in great abundance off the coast of Finmark, thus at Vadso, in 

 depths varying from 20 to 50 fathoms, especially where the bottom is sandy. 

 Off the west coast of Norway, it is much more rarely met with, though 

 occurring as far south as Egersund. 



Distribution. Arctic Ocean: Greenland, Spitsbergen, Iceland, Jan 

 May en, Labrador; east coast of North America ; British Isles, coast of Bolms- 

 liin, Kattegat, the Baltic ; coast of France (Chevreux). 



19 Crustacea. 



