ISiEA M0NTA6UI. 
215 
A MPHIP on A . PH OXIDES. 
NATATOEIA. 
ISMA MONTAGUI. 
Specific character. Eyes reniform. Superior antennas one-half the length 
of the animal. Gnathopoda having the propoda ovate. Pereiopoda having 
the propoda with the distal extremity serrated. 
Length, 5 4 0 inch. 
Iscea Montagui. Milne-Edwards, Ann. Sci. Nat. t. xx. p. 380. Hist, des 
Crust, t. iii. p. 26, pi. xxix. fig. 11. S pence Bate, 
Rep. Brit. Assoc. 1855, p. 58. Synop. Ann. Nat. Hist. 
2 ser. xix. p. 142, 1857. Cat. Amph. Crust. Brit. 
Mus. p. 122, pi. 22, fig. 1. White, Pop. Hist. Brit. 
Crust, p. 179. 
The eyes are not large, but kidney-shaped, and of a 
bright-red colour. The superior antennae are nearly 
half the length of the animal, the flagellum being as 
long as the peduncle, and the secondary appendage 
having but three articuli. The inferior antennae are 
not quite so long as the superior, and have the peduncle 
longer than the flagellum : the olfactory organs in this 
species are well developed. The first pair of legs are 
rather small, and have the palm of the hand very ob- 
