150 BRITISH COPEPODA. 



while the outer margin is only moderately so ; terminal 

 claw stout, sub-falciform. First pair of feet (fig. 6 

 and 6 a) thick and short ; first joint of the outer 

 branch elongated, ciliated on the external margin, and 

 bearing one short apical seta, second joint scarcely 

 more than half the length of the preceding, truncate at 

 the apex, which is armed with four or five short and 

 strong curved claws, and one long straight bristle, the 

 whole (as remarked by Mr. Norman) bearing a strong 

 resemblance to the foot of a feline animal ; inner 

 branch much shorter, its first joint long, ciliated on 

 the upper half of both margins, the internal edge 

 bearing also near the apex a long ciliated seta; 

 terminal joints small, 2-clawed. The inner branch of 

 the second foot in the male (fig. 7) has the first joint 

 short, broad, and armed at the outer angle with 

 a long plumose hair, second joint produced at each 

 apical angle into a long and strong spine, the outer 

 one being strongly ciliated ; third joint slender, shorter 

 than the spinous processes of the preceding joint, and 

 furnished with four apical seta3, one of which is very 

 long. The spines of the third foot in the male are 

 not unduly developed. The outer and inner segments 

 of the fifth pair of feet are of nearly equal length and 

 breadth in ike female (fig. 9), and each bears five 

 marginal setse of moderate length ; in the male the 

 inner segment is reduced to a single seta (fig. 10), the 

 outer one being fairly developed, quadrate, and bearing 

 four marginal setse. Margins of abdominal segments 

 not denticulated, but spinous at the angles. The last 

 segment of the abdomen is cleft, the caudal segments 



