40 BRITISH COPEPODA. 
two or three being long and having their marginal 
spines produced so as to form short branches. Man- 
dibles (fig. 5) broad and strongly toothed; basal 
joint of the palp large, and bearing two rather long, 
biarticulate branches. Masticatory portion of the 
maxilla (fig. 6) broad and strongly toothed; palp well 
developed. First two joints of the second foot-jaw 
(fig. 8) finely ciliated along the upper margins; the 
hand and nail both long and slender. First pair of © 
swimming-feet (fig. 9) robust and short ; inner branch 
rather longer than the outer, its second joint longer 
than the first; outer and apical margins of the joints 
fringed with large spines, those of the outer branch 
being shortly plumose, while the longer setz are either 
finely plumose or strongly pectinate. The other 
swimming-feet have both branches 38-jointed and 
nearly equal, the outer margins spinous and the larger 
spines strongly pectinated (fig. 11). The inner branch 
of the second foot in the male has the middle joint 
produced into a large spine-hke process (fig. 10), 
first joint marginate with strong spines, last joint 
long, slender, and bearing several long plumose sete. 
Basal joint of the fifth foot in the female (fig. 12) 
broad and quadrate, with ciliated margins, and armed 
along the distal border with five or six large thong- 
like setze of various lengths; outer joint much smaller, 
similarly armed, but having only one large and several 
small sete. The fifth foot in the male (fig. 13) is of 
somewhat similar character, but much smaller; the 
outer joint is large in proportion to the inner, and 
the marginal spines are much fewer and smaller. 
