PHOXUS HOLBOLLL 
143 
A MPH1P OB A . PH OXIDES. 
NATATORIA. 
Specific character. Superior antennae having the peduncle reaching as 
far as the extremity of the cephalon ; flagellum as long as the peduncle ; 
secondary appendage half as long as the primary. Inferior antennae scarcely 
longer than the superior. Grnathopoda subequal ; propoda quadrate ; palm 
hut slightly oblique; three anterior coxae having each five simple hairs upon 
the inferior margin, towards the hind-angle. 
Length inch. 
Phoxus Holbolli. Kroyer, Tidsk. vol. iv. p. 150. Spence Bate, Synop. 
&c. Ann. Nat. Hist. Feb. 1857, p. 58. Cat. Amph. 
Brit. Mus. p. 98, pi. xvi. fig. 2. White, Hist. Brit. 
Crust, p. 173. 
The general appearance of the animal much resembles 
that of P. simplex , but the antennae are longer, the su- 
perior pair are nearly as long as the head, and extend 
considerably beyond the extremity of the cephalon ; the 
peduncle reaches quite to the anterior margin of the pro- 
jecting hood; the first joint of the peduncle is tolerably 
long, but almost hid beneath the walls of the head ; the 
