FREE-SWIMMING COPEPODS OF THE WOODS HOLE REGION. 
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wi tli 4 plumose bristles, some of them twice the length of appendages; first joint of outer ramus 
scarcely one-third as long as second, first joint of inner ramus fully twice as long as second joint. 
Maxilla very much like that of Corynura forcipata Giesbrecht, rami absent, rounded inner lobe pro- 
vided with 11 hook-shaped, coarsely plumose bristles, external lobe slender, terminating in 3 strong, 
hook-shaped bristles, which are edged with short points. Anterior and posterior maxillipeds closely 
resembling the corresponding appendages of C. forcipata, but the points on the 7 long hook-shaped 
bristles of former pair of appendages more strongly developed, and there are only 3, instead of 4, 
prickly bristles on first basal joint of latter pair; first pair of feet with 3-jointed inner rami; inner 
rami of second to fourth pairs 2-jointed. In other respects structure of feet closely resembles that of 
congeneric species. Thus, the first foot is very much like that of C. denticulata, Giesbrecht, except 
for the 3-jointed inner ramus; fifth pair of feet asymmetrical, each 3-jointed; right foot longer and 
more voluminous than left, its second and third joints forming massive forceps. 
21. Corynura bumpusii new species; a, female, dorsal view; b, male, dorsal view; c, male, distal portion of right anterior 
antenna; d, male, posterior antenna; e , male, first foot; /, male, fifth pair of feet; </, female, fifth pair of feet. 
Female: Fourth and fifth thoracic segments fused, the latter ending on either side in a curved, 
ventrally and laterally directed process. Abdomen with 3 segments, genital segment large, somewhat 
swollen, as long as the 2 succeeding subequal segments together. Second segment with a cluster of 
bristly hairs on right side. Anal segment asymmetrical, fused with furca. Two limbs of furca of 
equal length, but the right is more than twice as broad as left, fringed with hairs along its inner 
border and bearing in place of outermost bristle a rigid, flattened, and pointed spine. This and the 
very slender innermost furcal bristles are not plumose; plumes on the apical fourth of long second 
furcal bristle, coarse and sparse. Anterior antennae reaching to base of furca, resembling those of 
C. forcipata, with several of median and basal joints fused together; large bristles with lamelliform 
margins; bristles on two terminal joints very long and coarsely plumose. Both sexes rather opaque 
and without pigment except along mid-ventral line, where there are segmental accumulations of black 
coloring matter in the male. 
