nev) Species of A nf arctic AmpJiipoila. loii 



waiils ; tlio first joint in tlic last two pairs with tlic liiml 

 iiiar^in piidiiif^ l)clow in a sharp tooth ; all the joints spinous 

 and clothed with long pfumose setce ; point ot" the dactylus 

 blunt, with a curved secondary tooth. 



Telson reaching beyond the end of the peduncles ot" the 

 third uroj)ods, the tip notcheil, divisions acute. 



Length of large specimen -ii!) mm. 



G ammaropsis longicornis, sp. n. 



W.Q. Jan. to Mar. 1902, 10 fatli. ; several specimens, 

 male and female. 



Body : first four si<le-plates not so deep as the segments. 

 Third pleon-segment dorsally depressed behind, posterior 

 angle rectangular. First urus-segment dorsally depressed in 

 front. 



Head almost as long as the first two segments ; ocular 

 lobe not much produced, angular. Eyes round, red in the 

 centre. 



Upper a7iten7ice in tlie female reaching beyond, in the male 

 not so far as, the end of the peduncle of the lower. Ap- 

 pendage 1-jointed, about one third of the length of the first 

 joint of the fiagellum. 



Loicer antenna' in female barely reaching to the pleon, in 

 the adult male almost as long as the ichole animal. Flaoellum 

 shorter than the last joint of the peduncle. 



First gnathopods : side-plates oblong, rounded below, deeper 

 than wide. \Vrist subequal in length and width to the 

 hand ; the hind margin of the latter evenly convex, palm 

 defined by two spines, spinulose. 



Second gnathopods. — Female: wrist subfriangular, half as 

 long as the hand ; palm of the liand subequal to the rest of 

 the hind margin, crenulate, the proximal half concave, the 

 distal convex ; palmar angle rounded, with three unequal 

 spines. Male : wrist very short, hind margin a little pro- 

 duced, subangular, and setose; hand widening distally, hind 

 margin rather longer than the palm and terminating in a 

 strong tootli ; palm almost transverse, with a strong tooth 

 separated from the palmar one by a deep sinus ; an irregu- 

 larly dentate and setose space between it and the base of the 

 dactylus which is carried over the side of the hand. 



Perceopods : last three pairs increasing in length succes- 

 sively, the last pair not exceeding the uropods ; posterior 

 angles of the first joints of the fourth and fifth pairs rectan- 

 gular, the joints narrowing suddenly in the middle. 



Third uropcds : peduncles twice as long as the styliform 

 rami. 



