WESTWOODIA. 141 



1. WESTWOODIA NOBILIS, Baird. PL LXIII, figs 1 13. 



Arpacticus nobilis, Baird. Trans. Berw. Nat. Club, ii, p. 155, 

 1845 ; Ann. and Mag. Nat. Hist, xvii, p. 416, 

 t. 9, figs. 5, 5 a, b, c, d (1846) ; Brit. Entomo- 

 straca, p. 214, tab. 28, figs. 2, 2 a e (1850). 



Westwoodia nobilis, Glaus. Die frei-lebenden Copepoden, p. 118, 

 t. 21, figs. 19 (1863). 



Boeck. Oversigt Norges Copep., p. 35 (1864). 







Anterior antennae short, in the male 6-jointed (fig. 3), 

 in the female 7-jointed, rather stout (fig. 2), third joint 

 much the longest, toothed on its upper edge, last 

 four nearly equal, and altogether scarcely as long 

 as the preceding joint ; all the joints setiferous. Inner 

 branch of the posterior antenna (fig. 4) rather large, 

 2-jointed. Hand of the second foot-jaw (fig. 8) oblong- 

 ovate, having a long spine-like seta near the middle of 

 the inner margin ; terminal claw long and slender. 

 The outer branch of the first pair of feet (fig. 9) con- 

 sists of one joint, which is large, ovate, and bears several 

 marginal spines and setae ; the inner branch is 3- 

 jointed, the first joint being much elongated and 

 having a very long plumose seta near the middle of its 

 inner margin ; terminal claw long and slender. The 

 inner branches of the three following pairs of swimming- 

 feet are much shorter than the outer, the first two 

 joints in both branches, but especially in the inner, 

 being unusually broad and angular. The inner branch 

 of the second pair in the male is only 2-jointed and 

 has modified spines. Fifth pair of feet of moderate 

 size and not very different in the two sexes, the mar- 



