160 Mr. A. 0. Walker on Crustacea 



60. Eusirus longipes, Boeck. A., H. 



51. Cheirocratus sundevaltii (Rathke). A. 



52. Mara tenuimana (Bate),= Mara batei, Norman. A. 



53. Eurysthens maculatus (Johnst.). II. 



54. Phtisica marina, Slabber. H. 



Diastylis bradyi, Norman, 1879, " Cumacpa of ( Lightning' 

 &c. Expeditions/' Ann. & Mag. Nat. Hist. ser. 5, vol. iii. 

 p. 59, ? . 



1888. Diasti/Hs hradyi, Norm., A. O. Walker, Proc. Biol. Soc. Liver- 

 pool, vol. ii. p. 178, 2 • 



1890. Diasti/lis spinosa, Norm., id. ibid. vol. iv. p. 247, $ & 6 • 



1892. Diasiijlis spinosa, Norm., id. ibid. vol. vi. p. 104, $ & 3 . 



1890. Diastylis spinosa, Norm., Brit. Assoc. Report on Marine Zoology 

 of the Irish Sea. 



1908. ? Diasti/lis bradii, Norman and Brady, Crust. Northumberland 

 and Durham. 



When I first took the male of this species (previously un- 

 known) with the female of U. bradii in Colwyn Bay, it 

 appeared to me to agree so well with Canon Norman's 

 description of his earlier species, D. spinosa, that 1 referred 

 it to that. As, however, Canon Norman now places his D. 

 spinosa under D. rathkei (Kroyer) *, it is evident that I was 

 in error. 



Monoculodes gibbosus, Chevreux, Bull. Soc. Zool. de France, 

 t. xiii. (1888), ? . 



Monoculodes yibbosns, Chevr. Result. Camp. Monaco, vol. xvi. p. 59, 



t. viii. fig. 3, 9 . 

 Monoculodes gibbosus, Chevr., Stebbing, Das Tierreich, Amph. Gamm. 



pp. 259, 720, $ . 



Monoculodes gibbosus, Chevr., £ . 



Body wide in front, carinate, hind margins of first nine 

 segments elevated ; the carina on the third and fourth pleon 

 segments conspicuously raised and arcuate ; sides of the sixth 

 pleon segment produced almost to the end of the telson in an 

 acute angle. 



Head a little longer than the first four segments, with a 

 carina separating the large dark oval eyes. Rostrum large, 

 reaching nearly to the distal end of the second joint of 

 ant. 1, evenly curved. 



Side-plate 1 expanded in front and fringed. 



* " Crust, of Northumberland and Durham," by Norman and Brady, 

 Trans. Nat. Hist, Soc. Northumberland &c, new ser. vol. iii. part 2, 

 p. 29. 



