210 Canon A. M. Xonnan o;i British Amphipoda. 



]838. Anotiyx htg€na,Kx'6yer,Gr'6i\\iinA& Amfipoder, pp. ii37 & 244, 



pi. i. tiff. 1, $. 

 ]838. Anonyx appe7idiculata, id. ibid. pp. 240 & 244, pi. i. fig. 2, c?. 

 1840. Ammyx appendiculata, II. Milne-Edwards, Hist. Nat. des Crust. 



vol. iii. p. 21. 

 184o. Anonyx ampvlla, Krbyer (not Phipps), Naturhist. Tidsskr., 2 



Raekkes, vol. i. p. 578; Voyage en Scandinavie &c. pi. xiii. fig. 2. 

 1891. Ancmyx nuyax, G. 0. Sars, (142) p. 88, pi. xxxi. 

 18il3. Anonyx nugox, T. Scott, Eleventh Annual Hep. Fish. Board 



Scotland, p. 212. 



Hob. " Several specimens of this fine species were obtained 

 in February 1889 near May Island, Firth of Forth, the largest 

 measuring 20 mm. (fully three quaiters of an inch) in length. 

 The eyes are lageniform, and, being large and black, give a 

 marked character to the species." Mr. Scott has kindly 

 allowed me to see the specimens and given me one of them. 



The occurrence of this truly Arctic species so far south is 

 of great interest. In 1869 I recorded this species as having 

 been found by me in Shetland ; but this was subsequently 

 found to be a mistake, the specimens proving to be large 

 examples of Tryphosa nanoides, Lilljeborg. 



Kot only aie these specimens interesting as an addition to 

 our fauna, but also on account of their size and the time of 

 the year (Februar}') in which they occurred. Sars gives as 

 dimensions " usual length of adult female 18 mm. ; maximum 

 length of Arctic specimen 40 ram." The largest specimen I 

 have in my collection is 43 mm. (Kara Sea). Now I have 

 large numbers of examples of what I take to be this species 

 procured by myself on the Norwegian and Finmarkian coasts 

 in the suminer months-, but none of these exceed 11 mm., which 

 is the measurement which Sars gives iox Anonyx Lilljehorgii. 

 Is the life of the Anonyx limited to a year, and do all the 

 females after they have produced their young in the spring 

 months then die? Herri. Sparre Schneider has suggested 

 that this is the case with certain Amphipods. As regards 

 these small summer-captured specimens of Anonyx, are they 

 the young of A. nugax, and is also Anonyx Liiljehorgii the 

 equivalent of those young? I am disposed to think so. My 

 specimens vary to some extent, but in the main agree very 

 fairly with Sars's description and figures of A. LiUjeborgiL 

 The characters of this form are mostly comparative, and, as has 

 already been pointed out by Stebbing (Amphipoda ' Willein 

 Barents'), are such as might naturally be expected as results 

 oi a younger stage. One point Sars mentions as though it 

 were important : — " The two anterior pairs of pereiopoda with 

 a very conspicuous obtuse denticle at the end of the propodos 

 immediately below the dactylus." This denticle is very 



