PHERUSA rUCICOLA. 



255 



AMPHIPODA. 



NATATOniA. 



GAMMARIDES. 



PIIERUSA rUCICOLA. 



Specific character. Pereion smooth. Pleon having a slight dorsal carina ; 

 the fourth segment being produced posteriorly to a small tooth. Posterior 

 pair of pleopoda having the rami equal, but not longer than the peduncle. 



Length ^g inch. 



Pherusa fucicola. Leach, Edin. Encyc. vii. Append, to Art. Crustaceo- 

 logy, p. 432. Enc. Brit. Suppl. 1, p. 426, pi. xxi. 

 Trans. Linn. Soc. xi. p. 360. Samouelle, Ent. Gomp. 

 p. 104. Desmarest, Consid. Crustaces, p. 269, pi. 

 xIy. fig. 10. Spence Bate, Cat. Amph. Brit. Mus. 

 p. 145, pi. xxvii. fig. 9. Thompson, Ann. Nat. 

 Hist. XX. p. 242, Oct. 1847. 



AmpMtoe fucicola. Milne Edwards, Ann. des Sc. Nat. t. xx. p. 377. Hist, 

 des Crust, t. iii. p. 32. Thompson, Nat. Hist. Ire- 

 land, iv. p. 396, and Ann. Nat. Hist. xx. p. 242. 

 White, Cat. Brit. Cmst. p. 50. 



Amphitoe Jurinii. Milne Edwards, Ann. des Sc. Nat. t. xx. p. 376. Hist, 

 des Crust, t. iii. p. 30, pi. i. fig. 2. Bell, in 

 Append. Belcher's Last of the Arctic Voyages, 

 p. 406. 



Amphitoe mici-oura. Costa, Rend, della Reale Accad. delle Scieuze di 

 Napoli, 1853, p. 175, tav. 3, fig. 2. 



Dexamine fucicola. Spence Bate, Ann. Nat. Hist. 2 ser. xix. p. 142, Feb. 

 1857. White, Hist. Brit. Crust, p. 179. 



The head is anteriorly produced into a small central 

 point, which generally lies hidden between the upper 



