434 
COROPHIIDiE. 
AMP III POD A. 
NAT ATOM A. 
PODOCERIDES. 
Genus— PODOCERUS. 
Podoccrus. Leach, Linn. Trans, xi. p. 360. Desmarest, Consid. sur 
Crust, p. 269. Samouelle, Ent. Comp. p. 185. Ed- 
wards, Hist, des Crust, t. iii. p. 63. Spence Bate, Ann. 
Nat. Hist. 2 ser. xix. p. 148. Gosse, Mar. Zool. p. 141. 
White, Hist. Brit. Crust, p. 197. Bruzelius, Skand, 
Amph. Gfamm. p. 20. 
Jassa. Leach, Linn. Trans, xi. p. 361. Desmarest, Consid. sur 
Crust, p. 269. White, Hist. Brit. Crust, p. 198, 
Ischyrocerus. Kroyer, Gron. Amfip. p. 59. 
Cratophium. Dana, U. S. Explor. Exped. p. 841. 
Elasmopus. Costa, Rend, della Reale Accad. delle Scienze di Napoli, 
1853, p. 170. 
Generic character. Superior antennae having a minute 
secondary appendage. Inferior antennae, not multiarticulate, 
robust ; flagellum short and tipped with hooks. Second pair of 
gnathopoda having the propodos largely developed. First and 
second pair of pereiopoda having the base very broad; third 
pair having the coxa scarcely as deep as that of the preceding- 
pair, and the lobes not equal in size. Posterior pair of pleopoda 
biramous, one ramus being furnished with one or more hooks. 
Telson squamiform. 
This genus has the eyes generally very small, and 
situated on a very prominent lobe, projected laterally 
between the superior and inferior pairs of antennae ; this 
lobe is formed of a plate so thin that we have frequently 
observed the ocular mass to stand as a projecting ball on 
the inner side. The superior antennae are invariably 
furnished with a secondary appendage, which is generally 
very small. The inferior antennae are longer, and more 
powerful than the superior ; the peduncle is long, and 
the flagellum very stout and strong, never multiarticulate, 
