209 Canon A. M. Norman on British Amphipoda. 



liigher up). The marked characteristics of this species are 

 the general structure of the antennal organs, the remarkable 

 epimera of the first segment of the mesosome, and the abso- 

 lutely divided telson. The first gnathopods have the hand 

 shorter than the wrist, oblong, very slightly tapering, the 

 palm very oblique, defined by a cluster of setse, and bearing 

 on its edge a remarkably delicate plate cut into serrations, 

 the serrations very fine and not densely placed*; nail strong, 

 bearing a secondary tooth near the apex as in the genus 

 Hoplonyx. But the character which first caught my eye as 

 distinguishing the species from any other Lysianid known to 

 me, though figured by Hansen, is not mentioned in his 

 description. From the end of the first long joint of the fila- 

 ment of the antennules there is projected a very long and 

 slender spine (see Hansen, fig. 6 a), which reaches to the 

 middle of the fifth following articulation. 



Genus 20. Ueistes, Dana. 

 = Pseudotryphosa (G. 0. Sars). 



43. Uristes umhonatus, Gc. O. Sars. 



1886. Ichnopus umhonata, G. 0. Sars, (102) p. 79, pi. iii. fig. 2. 



1891. Pseudotryphosa timbonata, G. O. Sars, (142) p. 83, pi. xxix. 



fig. 2. 

 1899. Uristes umhonatus, Stebbing, Ann. & Mag. Nat. Hist. ser. 7, 



vol. iv. p. 211. 



Hob. A single specimen, ' Porcupine,' 1869, Stat. 82, 

 lat. 60° 0' N., long. 5° 13' W., in 312 fathoms. Tliis station 

 is directly north of Cape Wrath, and is on the '' Wyville 

 Thomson Ridge." 



This, like the last, is a species taken by tlie ' Porcupine ' 

 exactly on the line which I regard as limiting the British 

 area. 



Distrih. Two other specimens are known, one taken by 

 Sars at Hvitingso, west coast of Norway, in 150 fatiioms, 

 the other at Skagarak (^Gunhild's Exped., fide Sars)^ in 

 400-420 fathoms. 



Genus 21. Anonyx, Kroyer. 



44. Anonyx nugax (Phipps). 



1774. Cancer migux, Phipps, Voyage towards the North Pole, p. 192, 

 pi. xii. fig. 2. 



* This serrated edge exactly corresponds in character with that figured 

 by Stobbiiig as developed on the pahiis of Platamon longimanuSy Report 

 ' Challenger ' Amphip. pi. xiii. fig. yn^. 



