478 Wisconsin Academy of Sciences^ Arts, and Letters. 



The left foot reaches to one-haK 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 & 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. F. 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 furcal setao and the distal ends of 

 the antennae are colored a deep purple. 



DIAPTOMUS SANGUINEUS ForbcS. 



Plate XXV/, figs. 2, 5^ ^. 



1876. Diaptomus sanguineus Forbes, pp. 15, 16, 23; figs. 24, 



28-30. 

 1882. Diaptomus sanguineus Forbes, p. 647 ; pi. VIII, figs. 



1-7, 13. 

 1884. Diaptomus sanguineus Herrick, p. 138 ; pi. Q, fig. 12. 

 1884. Diaptomus mirmetonha Herrick, p. 138 ; pi. Q, fig& 



8-10. ^ ^ , ,^ 



1889. Diaptomus sanguineus DeGueme and Richard, p. 20; 



figs. 9-11 ; pi. IV, fig. 24. 

 1893. DiaptoTYius 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; pi. 

 XIII, figs. 8-10. 



