410 Wisconsin Academy of' Sciences, Arts, and Letters. 
The antennae are 2 5-segmented and nearly reach the ends of 
the fureal setae. The right male antenna is swollen anterior 
to the geniculating joint; the antepenultimate segment has no 
special armature. 
The first basal segments of the female fifth feet have the 
spines of the posterior surface of moderate size. The lateral 
hair of the second basal segment is of moderate size. The 
first segment of the exopodite is twice as long as wide. The 
hook of the second segment is slender and rather slightly 
curved. It is finely denticulate on the inner margin. The 
third segment is ordinarily represented by two spines, of which 
the outer is the longer. In some cases, however, the inner 
spine arises from a small segment, which represents the third 
segment of the exopodite. The endopodite slightly exceeds in 
length the first segment of the exopodite. It is obtusely point¬ 
ed, is setose at the tip, and armed with two rather long terminal 
spines. 
The first basal segments of the male fifth feet have the spines 
of the posterior surface of moderate size. The second basal 
segment is a little less than twice as long as wide. The lateral 
hair is situated at the beginning of the distal third. The first 
segment of the exopodite is trapezoidal in form, its length and 
breadth are about equal, and it is somewhat produced on th3 
distal exterior angle. The second segment is twice as long as 
its width and is slightly curved on the exterior margin. On 
the posterior surface near the internal margin it bears a small 
spine; this is situated at the end of the proximal third of the 
segment. The lateral spine is situated near the end of the 
segment; it is about two-xhirds as long as the segment, is 
slightly curved, and minutely denticulate on the inner margin. 
The terminal hook is slender, regularly curved, and nearly 
equals in length the whole of the right foot. It is finely den¬ 
ticulate on the inner margin. The endopodite is one-segment- 
ed, rather stout, and exceeds in length the first segment of the 
exopodite. It is setose at the tip. The left foot equals in 
length the right. The second basal segment is in form like 
the corresponding segment of the right foot, but is somewhat 
smaller. There is a slight projection on its inner margin. 
The lateral hair is situated at the beginning of the distal third. 
The first segment of the exopodite is twice as long as wide. 
