96 BRITISH COPEPODA. 



dage which spriugs from the apex of the third, is 

 short, broad, and curved ; the anterior antenna of the 

 female (fig. 2) has the second joint developed into a very 

 large, subquadrate swelling, while the last two joints 

 are much more slender and form a strong claw-like 

 appendage, the last joint having also a subsidiary 

 spine at the base. Setae of the posterior antennas 

 (fig. 4) very strong and spine-like ; secondary branch 

 1 -jointed, of moderate size, and having four setae. 

 Hand of the lower foot- jaw ovate, with a slender ter- 

 minal claw. Inner branch of the first foot (fig. 7) 

 rather longer than the outer, 2-jointed, terminating in 

 two long setae, the longest of which has an apical tuft 

 of spreading, root-like hairs; the outer branch has 

 three setae, one of which also is tufted at the 

 apex. The second foot is shorter than the three 

 following pairs, and is much more slenderly spined ; 

 inner branch of the second pair (fig. 8) slender, not 

 much longer than the first joint of the outer branch, 

 2-jointed, the first joint extremely short, the second 

 having one marginal and two apical setae, all of about 

 equal length, and finely plumose beyond the middle. 

 Inner branch of the third foot robust (fig. 9), the two 

 joints subequal, bearing at the apex one long terminal 

 spine and two setae, the shorter of which is plumose 

 (these appendages are stouter in the male than in the 

 female) ; the terminal spines of the outer branch are 

 very short and thick. The fourth pair (fig. 10) has 

 the inner branch rudimentary, 2-jointed, and provided 

 with one stout apical seta and two shorter and more 

 slender; the second, third, and fourth pairs are of 



