AMPHIPODA. 



NATATORIA. 



CRANGONYX SUBTERRANEUS. 327 



QAMMARIDES. 



CRANGONYX SUBTERRANEUS. 



Specific character. Superior antennse more robust than the 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 5^ inch. 



Crangonyx, sitbterraneu.s. Spenoe Bate, Proceed. Dubl. Univ. Zool. and Bot. 

 Assoc. 1859. Nat. Hist. Rev. vol. vi, p. 166, 

 fig. 3. Cat. Amph. Crust. Brit. Mus. p. 178, 

 1)1. 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 



