98 BRITISH COPEPODA. 



mandible-palp simple, 3-jointed. Maxilla-palp small, 

 2-jointed. First pair of foot-jaws small, with a 

 terminal claw and two or three marginal claw-like 

 setas ; second pair forming a prehensile hand. Inner 

 branch of the first pair of feet 2-jointed, non-pre- 

 hensile, shorter than the outer branch ; inner branches 

 of the second, third, and fourth pairs also short and 

 2-jointed ; outer branches 3-jointed ; fifth pair short 

 and broad, 2-jointed. 



This genus differs from Cletodes in having a 1- 

 jointed secondary branch springing from the posterior 

 antennae, and in the elongated 3-jointed mandible- 

 palp. 



1. ENHTDROSOMA CURVATUM, Brady and Robertson, 



PL LXXXI, figs. 12 15; 

 and PL LXXXII, figs. 

 1119. 



RMzothrix curvata, B. & R. Brit. Assoc. Report, p. 197 (1875). 



The anterior antennse (figs. 13 and 14, PL LXXXII) 

 are short and stout, and beset with numerous setaa, 

 many of which are strongly plumose ; the penultimate 

 joint in the male forms a large vesiculiform swelling 

 and the last joint is claw-like. The posterior antenna 

 (fig. 14) has attached to its apex three stout, lancet- 

 shaped setas, one of which is strongly pectinate, and 

 four or five smaller lateral setaa ; the secondary branch 

 bears two setas. The mandible (fig. 15) is bluntly 



