150 BRITISH COPEPODA. 
while the outer margin is only moderately so; terminal 
claw stout, sub-falciform. First pair of feet (fig. 6 
and 6a) thick and short; first joint of the outer 
branch elongated, ciliated on the external margin, and 
bearing one short apical seta, second joimt 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, cilated 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 jomt 
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 sete, 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 im the female (fig. 9), and each bears five 
marginal sete 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 sete. Margins of abdominal segments 
not denticulated, but spinous at the angles. The last 
segment of the abdomen is cleft, the caudal segments 
