478 Wisconsin Academy of Sciences 9 Arts, cmd Letters . 
The left foot reaches to one-half the length of the second 
segment of the right exopodite. The second basal segment is 
long and rectangular, equaling in length the correspond¬ 
ing segment of the right foot, but is not so wide; the lateral 
hair is situated not far from the distal end of the segment. 
The first segment of the exopodite is twice as long as wide, of 
nearly the same width through its whole length, the inner and 
outer margins slightly convex, the inner margin setose. The 
second segment is conical in form, with a rounded ciliate pad 
on its inner margin; the segment terminates in a blunt digi¬ 
tate process. The endopodite of the left fifth foot is one-seg- 
mented and shorter than the first segment of the exopodite; it 
is setose at the tip. 
Length of female, 2.56 mm. Length of male, 2.24 mm. 
This was collected by Prof. C. P. Baker in Havana, Cuba, 
and was found associated with D. asymmetricus. 
The species is very conspicuous, for, in addition to being of 
large size, the furcae, the fureal setae and the distal ends of 
the antennae are colored a deep purple. 
DIAPTOMUS SANGUINEUS PorbeS. 
Plate XXVI, figs. 2, 5. 
1876. Diaptomus sanguineus Porbes, pp. 15, 16, 23; figs. 24, 
28-30. 
1882. Diaptomus sanguineus Porbes, p. 647; pi. VIII, figs. 
1-7, 13. 
1884. Diaptomus sanguineus Herrick, p. 138; pi. Q, fig. 12. 
1884. Diaptomus miwietonka Herrick, p. 138; pi. Q, figs. 
8 - 10 . _ . ■ 
1889. Diaptomus sanguineus DeGueme and Biehard, p. 20; 
figs. 9-11; pi. IV, fig. 24. 
1893. Diaptomus sanguineus Marsh, p. 195; pi. Ill, figs. 1-3. 
1895. Diaptomus sanguineus Herrick and Turner, p. 71; pi. 
V, figs. 8, 9; pi. XIII, fig. 12. 
1895. Diaptomus minnetonka Herrick and Turner, p. 71; pL 
XIII, figs. 8-10. 
