AMPHIPODA AND ISOPODA OK THE FIRTH OK CLYDE. 211 



that probably the unnotched form of the hand 

 belongs to individuals not adults, unless the species 

 gibbosa and dolichonyx are distinct. In uniting his 

 own 'Tritceta gibbosa with Spence Bate's Atylus 

 gibbosus, Boeck assumes that Spence Bate has 

 committed some errors of observation. It is indeed 

 almost certain that he has transposed the gnathopods, 

 probably through taking it for granted that the 

 larger hand would belong to the second pair, whereas 

 in the present instance it really belongs to the first. 



Genus Halirages, Boeck. 

 HALIRAGES BISPINOSUS (Spence Bate). 



Dexamine bisjjinosa, S. Bate, Synopsis Brit. Edr. 

 Crust, Ann. and Mag. Nat. Hist., ser. 2, vol. 19. 

 (1857), p. 142. 



Amphitho'e macrocephala, M. Sars, Overs, over 

 norsk-arct. Krebsdyr, Forh. i. Vid.-Selsk.i. Christiania 

 (1858), p. 142. 



Paramphitho'e elegans, Bruzelius, Skand. Amph. 

 Gamm. (1859), p. 75, fig. 14. 



Amphithopsis elegans, A. Boeck, Forh. ved de 

 Skand. Naturf., 8de mode (1860), p. 662. 



Atylus bispinosus, Spence Bate, Brit. Mus Catal. 

 Amph. Crust. (1862), p. 140 ; pi. xxvii. fig. 1. — Norman, 

 Rep. on the Shetland Crustacea (1869), p. 280. 



Halirages bispinosus, A. Boeck, Crust, amph. bor. 

 et arct. (1870), p. 115. 



Habitat— Common in the Firth of Clyde. 



By some neglect this species was omitted from 

 my first contribution. 



Dr. Norman thinks that Spence Bate has perhaps 

 mistaken the male of this species for Fherusa 

 bicuspis. 



Genus Calliopius, Lilljeborg. 

 CALLIOPIUS NOBVBGICUS (Rathke). 

 Amphithoe norvegica, Rathke, Beitr. z. Fauna 

 Norwegens, Act. Leop. 1843; tab. xx. p. 83, tib. 4,, 

 fig. 6. 



