PHRONIMA. 21 



AMPHIPODA. PHRONIMIDES. 



HYPERINA. 



Genus— PHRONIMA. 



Phronima. Latkeille, Hist. Nat. Crust, et lus. vi j). 289. Spence Bate, 



Cat. Amph. Brit. Mu.s. p. 316. 

 Phronyma. Leach, in Sam. Ent. Comp. p. 101. 

 Phronoma. Spence Bate, Ann. Nat. Hist. 2 ser. -xix. p. 150. 



Generic character. Cephalon large, broadest at the top, and 

 gradually decreasing to the oral aperture. Eyes upon the 

 dorsal surface of the cephalon. Superior antennae imperfectly 

 developed. Inferior antennae obsolete. Mandibles without an 

 appendage. Pereion broad and flat. Guathopoda small ; carpi 

 having the infero-anterior angles produced. Pereiopoda, con- 

 sisting of but six joints, third pair chelate. Pleon narrow. 

 Three posterior pairs of pleopoda biramose, lanceolate. Telsou 

 small, single. 



The head in this genus is much broader at the top 

 than at the mouth. The body is tolerably broad, and 

 the tail is very narrow. The eyes are large, and placed 

 upon the top of the head. The superior antennee are 

 but imperfectly developed, consisting only of two joints, 

 one probably representing the peduncle, the other the 

 flagellum, the latter armed along two-thirds of its distal 

 length with about sixteen long flattened filaments. The 

 inferior antennae appear to be altogether wanting. The 

 mandibles are without an appendage. The first two pairs 

 of legs are small, and have the wrists inferiorly produced, 

 and each terminates in a minute finger, flanked at the 

 base on each side by a small wing-like process, which Mr. 

 Spence Bate, in the Catalogue of the British Museum, 

 has named dactyloptera. The remaining legs only possess 



