410 Wisconsin Academy of Sciences, Arls, and Letters. 



The antennae are 2 5 -segmented and nearly reach the ends of 

 the furcal 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 ths 

 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 th^ 

 segment. The lateral spine is situated near the end of the 

 segment; it is about two-ihirds 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 thirti. 

 The first segment of the exopodite is twice as long as wide. 



