10 HYPERIIDA. 
AMPHIPODA. AYPERIIDA. 
HYPERINA. 
Genus—HYPERIA. (Latreille.) 
Hyperia.  LATREILLE, in DesmMArzst?’s Consid. sur Crust. p. 258, 1825. 
Mini Epwarps, Ann. des Sci. Nat. xx. p. 387. Hist. des 
Crust. t. iii. p. 74. Dana, U.S. Explor. Exped. p. 986. 
Spence Bare, Cat. Amph. Brit. Mus. p. 292. 
Metocchus. Kroyer, Grénl. Amfip. p. 60. Minne Epwarps, Hist. des 
Crust. iii. p. 78. 
Tauria. Dana, U.S. Explor. Exped. p. 988. 
Hiella, Strauss, Mém. du Muséum t, xviii. 
Generic character. Cephalon large, orbicular. Eyes large, 
occupying most of the lateral, and encroaching upon the frontal, 
walls of the head. Antenne short, subequal. Gnathopoda 
nearly alike, small ; first pair nearly simple, the second complexly 
subchelate. Pereiopoda subequal. Three posterior pairs of 
pleopoda biramose. ‘'T'elson squamiform. 
Tue head is large and rounded. The body is broad 
and convex. The eyes occupy the greater portion of 
the lateral and dorsal walls, and encroach upon the 
frontal surface of the head. The antenne are short, 
being never longer than the depth of the head, and nearly 
equal in length. The lower pair are inserted at a consi- 
derable distance from the upper. The arms are small 
and imperfectly prehensile, but formed upon the com- 
plex type so generally prevailing in this division of 
Amphipoda. The walking legs are nearly of similar 
length, and tolerably strong. The caudal appendages 
are biramose, and the middle piece consists of a small 
lanceolate scale. 
Dana has, we think correctly, associated the genus 
Metorcnus of Kroyer with the present, from which it 
