Canon A. M. Norman on British Isopoda. 446 



the entire dorsal surface, but are present also on the peduncles 

 of the antennules, the epimera of the last three segments, 

 and the legs. They are especially conspicuous upon the 

 metasome, where the individual granules, lying in one 

 direction (backwards), are more clearly separable than on 

 other parts of the body, and when viewed under the micro- 

 scope each is seen to bear a minute ciliura. The epimera of 

 the last three segments are more widely rounded distally 

 than in var. tuherosus of the last species. The peduncles of 

 the antennules are not only covered with granules, but bear 

 setae which are more developed than is usual in forms of 

 A. haffini. Length 35 mm. This form is so markedly 

 distinct from A. haffini that it would certainly seem to be 

 a good species. I have seen several specimens which were 

 taken by Sir John Murray on H.M.S. 'Triton' in 1882. 

 It was dredged in the cold area of the Faroe Channel, 

 Stat. 4, lat. 60° 22' N., long. 8° 21' W., in 327 to 430 fathoms 

 (Mus. Nor.). 



Arcturus hystrix, G. O. Sars. 



1876. Arcturus hjstj-ix, G. O. Sars, I. c. p. 350. 



1885. Arcturus hystrix, G. O. Sars, I. c. p. 104, pi. ix. figs. 23-26, 



1901. Arcturus hystrix, Ohlin, " Arctic Crustacea, Leptostraca, 



Isopoda, Cumacea," K. Sveiiska Vet.-Akad. Handl. vol. xxvi. p. 30, 



pi. ii. fig. 6 a, pi. iii, tigs. 6b-k. 



' Porcupine,' 1869, Stat. 50, lat. 59° 54' N., long. 7° 52' W., 

 355 fathoms, and Stat. 59, lat. 60° 21' N., long. 5° 41' W., 

 580 fathoms. The tirst of these localities is just within the 

 British Area, the second is in the cold area of the Faroe 

 Channel. 



Genus 2. Aectueella, G. O. Sars. 



1. Arcturella dilatata, G. O. Sars. 



1882. Astncilla dilatata, G. 0. Sars, I. c. p. 63, pi. ii. fig. 3. 

 1897. Arcturella dilatata, G. O. Sars, I, c. p. 92, pi. xxxviii. 



My late friend Dr. D. Robertson found this many years 

 ago, as recorded by him in his ' Cat. Amphip. and Isop. of 

 tlie Clyde/ pt. 2, p. 28, in 20 fathoms off Blackwaterfoot, 

 Isle of Arran, and kindly sent me specimens. Dr. Thomas 

 Scott has given me examples from off Fair Isle, that is 

 between Slietland and Orkney, and from the Copenhagen 

 Museum I have received Danish specimens. 



2. Arcturella danmoniensis (Sbebbing). 



1874. Arcturus damnoniensis, Stebbing, "A new Species o( Arcturus,^' 

 Ann. & Mag. Nat. Hist. ser. 4, vol. xiii. pi. xv. 



