so in the 2nd, propodal joint in both paii's oval in form, scarcely serrate along 

 the inner edge, Init all over densely spinoiis, dactylns very small. The 2 

 anterior pairs of pereiopoda having fascicles of short In'istles along the 

 posterior edge. Uropoda almost exactly as in H. f/alha. Colour dark pnrplish 

 brown from niimerons pigmentary spots distributed over the wliole body as 

 also on the limbs. Length of adnlt female 15 mm. 



RemarJcs. — I think Dr. Bovallius is right in l^elieving the form 

 described Ijy Bfieck under the name of Hyperia f^pmiiws to lie most likely 

 identical with the Cancer medusariim of 0. Fr. Mtiller, and hence the latter 

 specific denomination ought to be retained for the jn'esent form. Although 

 in its general habitus very like the jn-eceding sjoecies, this form may at once 

 be distinguished, on closer examination, by the rather different foi'm and 

 armature of tlie gnathopoda, a character wliicli suggested the specific name 

 of spinipcs proposed by Boeck. 



Occnrrcncc. — West coast of Norway, found parasitic on Cynnea, 

 occasionally also on Anrclia, but less frequently than the preceding species. 



Distrihutiof). — Arctic Ocean: Greenland and Sjiitsbergen. 



Gen. 2. Hyperoche, liovallius, 1887. 

 Syn : Metoecna KrOyer, Tonrin Boeck. 



Form of liody aljout as in Hyperia, but with the cephalon somewhat 

 more regularly rounded. Inferior antennfP in female much smaller tlian the 

 superior ones; both pairs in male greatly elongated. Mandibles ^^'^th the 

 molar expansion narrow lanceolate and unarmed. First pair of maxillje 

 having the palp very broad and lamellar. (rnatliopoda siibsimilar, both 

 distinctly chelate, the carpal joint being pi'oduced inferioi'ly to a compressed 

 knife-like process reaching to the end of, or V)eyond, the propodal joint, and having 

 tlie inner edge finely serrate; propodal joint narrow, attenuated, with the 

 inner edge serrate; dactylus rather short. The two anterior pairs of pereio- 

 poda having the carpal joint slightly expanded and compressed; posterior 

 pairs subequal. Uropoda ami telson about as in Hyperia. 



Remarks. — The generic name Metoecus of Kroyer having been em- 

 ployed in Zoology at an earlier date. Dr. Bovallius has proposed a new 

 generic denomination, viz., Hyperoche. The same autlior has likewise shown 

 tliat the northern form cannot properly be referred to the geniis Tanria of 

 Dana, as suggested by Boeck. The genus is easily recognised ])y the peciiliar 

 structure of the gnathopoda. Otherwise it comes rather near to Hyjieria, 

 though differing also somewhat in the structure of the oral parts. Dr. Bo- 



