370 



GA MM ARID ;E. 



AMPII1PODA 



NAT ATOM A. 



GAMMARiDEx. 



GAMMARTJS MAPJNUS. 



Specific character. First three segments of the pleon having the postero- 

 inferior angle rounded. Posterior pair of pleopoda having the internal ramus 

 very short. 



Length 4 inch. 



Garni 



marus mar mm. 



Gammarus Olivii. 



Gammarus affinis. 



Leach, Linn. Trans, xi. p. 359. Suppl. Encyc. Brit. 



i. p. 425. Samouelle, Ent. Comp. p. 103. 



Thompson, Ann. Nat. Hist. xx. p. 242. White, 



Cat, of Brit. Crust, p. 52. Pop. Hist. Brit. 



Crust, p. 183. Desmarest, Consid. sur Crust. 



p. 267. Spence Bate, Cat. Amph. Crust. Brit. 



Mus. p. 215, pi. xxxviii. fig. 4 (not Milne 



Edwards). 

 Milne Edwards, Ann. des Se. Nat. t. xx. p. 369, 



pi. x. fig. 9, 10* (August, 1830). Hist, des Crust. 



t. iii. p. 47. 

 Milne Edwards, Hist, des Crust, t. iii. p. 47, 



1840. 



* It may be useful to notice that Milne Edwards's references in Hist. Nat. 

 Crust, iii. p. 47, to his figures of G. Olivii and ornatus are reversed, and 

 that even the references in the Annales, xx. pp. 372, 373, to the details of 

 this species are incorrect. 



