ADDITIONS TO L.M.B.C. COPEPODA. 315 



character of Pseudocyclopia, Scott, in which the primary 

 branch is described as being three-jointed. The basal joint 

 has two marginal setae, the terminal joint having a number 

 of apical setae. Secondary branch large, five-jointed, the 

 first, second, and apical joints being about twice as long 

 as broad, the third and fourth about half as long as broad. 



Mandibles (fig. 4) large, consisting of a broad biting 

 part furnished with two plumose spines, and a two- 

 branched palp, one of the branches being two, the other 

 four-jointed. 



Anterior foot-jaw (fig. 5) four-jointed, with several 

 marginal processes, bearing long setae, some finely plumose, 

 the third joint having two powerful serrated claw-like 

 spines ; the fourth joint very small, and terminated with 

 two long setae. The posterior foot-jaw (fig. 6) is seven- 

 jointed, the basal joint large, about twice as long as broad, 

 bearing several marginal spines, the upper distal angle 

 protruding upwards, and terminated by three long setae, 

 the lower one plumose. The second joint is about equal 

 in length to the first, and little more than half its width ; 

 the inner margin clothed with short setae, and having 

 three long plumose setae ; the five terminal joints are 

 small, their combined length being rather less than the 

 first or second joints, and all thickly clothed with long 

 setae. 



The swimming feet are very similar to those of P. 

 crassicornis , Scott. The outer branch of the first pair 

 (fig. 7) is three-jointed, each joint being provided with a 

 stout dagger-like spine at the outer distal angle ; the inner 

 branch is one-jointed, and rather longer than the first 

 joint of the outer branch. The outer branch of the second 

 pair (fig. 8) is also three-jointed ; each of the first and 

 second joints bear one, and the last joint four, stout 

 serrated spines of variable length, the terminal one being 



