282 TEANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



to the end of the 1st joint of the nagellum of the upper 

 antennae. 



Gnathopods feeble, and nearly alike ; in the first the 

 front margins of the carpus and propodos are about 

 equally long, in the second the former is rather the 

 shorter; very like the same limbs in P. assimilis, G. 0. 

 Sars. 



Perceopods, the 1st joint of the last 3 pairs wide oval, 

 the hind margins smooth. 



Third uropods rather stouter than in P. assimilis. 



Telson rounded oblong as in P. assimilis. 



Colour yellowish white. 



Very near P. assimilis, G. 0. Sars, but differs in having 

 no teeth on the lower margins of the first 3 coxal plates, 

 in the smooth margins of the 1st joint of the perseopods, 

 and in the different form of the hind margin of the third 

 pleon segment. 



Family Gammarltxe. 

 Genus Melita, Leach, 1814. 



Melita dentata (Kroyer). 



Seven males, two females. Length of largest male 

 8 mm. 



A widely distributed northern species, ranging from 

 Spitzbergen to Grand Manan on the coast of New 

 Brunswick (lat. 44°-40°). It has been taken by Canon 

 A. M. Norman on the coast of Northumberland, but not, 

 as far as I know, on our west or south coasts, or hitherto 

 on the west coasts of America. 



Genus Mceroides, n. gen. 



Like Mara, Leach, as restricted by G. 0. Sars, except — 



1. The mandibular palp is very strong, the terminal 



joint rather shorter than the preceding, but 



