PHERUSA FUCICOLA. 
255 
AMP HIP on A. 
NATATORIA. 
GAMMARIDES. 
PHERUSA FUCICOLA. 
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 ^ inch. 
Pherusa fucicola. 
Amphitoe fucicola. 
Amphitoe Jurinii. 
Amphitoe microura. 
Dexamine 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. Samotjelle, Ent. Comp, 
p. 104. Desmarest, Consid. Crustaces, p. 269, pi. 
xlv. fig. 10. Spence Bate, Cat. Amph. Brit. Mus. 
p. 145, pi. xxvii. fig. 9. Thompson, Ann. Nat. 
Hist. xx. p. 242, Oct. 1847. 
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. Crust, p. 50. 
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. 
Costa, Rend, della Reale Accad. delle Scienze di 
Napoli, 1853, p. 175, tav. 3, fig. 2. 
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 
