Canon A. M. Norman on British Amphipoda. 206 



of urosome deeply grooved in front, humped and distally 

 truncate (exactly as T. angulata) (fig. 20) . Antennaj of both 

 pairs very much as figured for male of T. Horingii^ but 

 basal joint of upper less stout ; flagellum of eighteen articula- 

 tions, the first nearly equal in length to the basal joint of the 

 peduncle, accessory appendages of seven articulations, first 

 only slightly longer than the second; flagellum of lower 

 antennoe with twenty-five articulations ; both pairs furnished 

 with calceolse. Gnathopods of both pairs of the usual form 

 in the genus and very like those of T. Sarsi ; first slender, 

 the hand slightly shorter than the wrist ; the second with 

 hand obovate, somewhat wider than the wrist, finger well 

 developed. Last uropods with long rami and fully twice the 

 length of the telson, which bears three pairs of lateral spines. 

 In all that has been said this species closely resembles the 

 characters of the genus Tri/phosella ; but on examining the 

 mouth-organs it is seen that instead of the epistoma over- 

 hanging the upper lip, the upper lip projects beyond the 

 epistome as in Orchemenopsis or as in Tryphosa nana, which 

 in this respect differs from other species which Sars assigns to 

 that genus. Indeed, these allied genera seem constituted on 

 very unsatisfactory characters, and I cannot but think that 

 an amalgamation is desirable. 



Length 6 millim. 



The angular projection of the sides of the cephalon, the 

 character of the epistoma, the rounded hind corner of the 

 third segment of the metasome, and the form of the first 

 segment of the urosome distinguish this species from allies. 



A single specimen taken by Sir J. Murray in H.M.S. ' Tri- 

 ton ' in 1882, Stat. 7, lat. 60° 19' N., long. 7° 10' W., in the 

 cold area of the Faroe Channel, 585 fathoms.] 



38. Tryphosella nanoides (Lilljeborg). 



1805. Anonyx nanoides, Lilljeborg, On the Lysianassa magellanica 



&c. p. 25, figs. 32-34. 

 1876. Tryphosa nanoides, Boeck, (138) p. 186. 

 1891. Tryphosa nanoides, G. O. Sars, (142) p. 79, pi. xxviii. fig. 2. 

 1893. Tryphosella nanoides, J. Bouuier, /. c. p. 171. 



Hah. Shetland *, in great numbers on a dead fish ; Pol- 

 perro, Cornwall, on a skate {A. M. N.) ; Ardbear Bay, Ireland 

 {Brady ds Robertson) . 



Distrib. ij\tQv\dLn(\. {Copenhagen Mus.) : Mas. Nor. West 

 Norway and Finmark, in 50-100 fath., and, like myself, Sars 



* In my Shetland Report young specimens of this species were rightly 

 referred to it, but full-grown examples were wrongly named " Anony.v 

 ampidla." 



