330 



AMPHIPODA. 



NATATORIA . 



GAMMARID^. 



OAMMARIDES. 



GAMMARELLA BREVICACDATA. 



Specific character. Superior antennse half the length of the animal. 

 Inferior antennse scarcely longer than the peduncle of the superior. First 

 pair of gnathopoda small ; second pair having the propodos very largely 

 developed. Posterior pair of pleopoda having the ramus not longer than the 

 peduncle. Telson as broad as long. 



Length \ inch. 



Gammarus hrevicaudatus. 

 Ganimarella hrevicaudata. 

 Gammarella orch estiformis. 

 Gammarus punctimanus. 



Milne Edwards, Ann. des Sci. Nat. t. xx. 



p. 369. Hist, des Crust, t. iii. p. 53. 

 Spence Bate, Cat. Amph. Crust. Brit. Mus. 



p. 180, pi. xxxii. fig. 8. 

 Spence Bate, Ann. Nat. Hist. 2 ser. xix. p. 143. 



White, Hist. Brit. Crust, p. 181. 

 Costa, Mem. Reale Accad. d. Sci. di Napoli, 



vol. i. tav. iii. fig. 6, 1853. 



The dorsal surface in this species is slightly elevated 

 at the posterior portion of each segment, especially in 

 the fourth segment of the tail, owing chiefly to the 

 smallness of the two succeeding segments, which appear 



