CRANGONYX SUBTERRANEUS. 
327 
AMP HIP ODA . OA MM A RIDES . 
NATATORIA. 
CRANGONYX SUBTERRANEUS. 
Specific character. Superior antennae more robust than tbe inferior ; 
flagellum not longer than the peduncle ; secondary appendage biarticulate. 
First pair of gnathopoda larger than the second. Posterior pair of pleopoda 
scarcely reaching beyond the telson. 
Length inch. 
Orangonyx subterraneus. Spence Bate, Proceed. Dubl. Univ. Zool. and Bot. 
Assoc. 1859. Nat. Hist. Rev. vol. yi. p. 166, 
fig. 3. Cat. Amph. Crust. Brit. Mus. p. 178, 
pi. xxxii. fig. 6. 
This animal is not so slender as the species of the 
genus Niphargus. The eyes are imperfectly formed, and 
distinguishable by some small irregular patches of lemon- 
coloured pigment. The superior antennae are about one- 
fourth the length of the animal, having the flagellum as 
long as the peduncle, and furnished with a two-jointed 
secondary appendage. The inferior antennae are not 
perfect in the only specimen that we have seen, but 
