1106 Wisconsin Academy of Sciences, Arts, and Letters. 
planations are required as it has been thoroughly discussed 
elsewhere. 
CYCLOPS AEQUOREUS Fischer. 
1853. Cyclops magniceps Lilljeborg. 
1860. “ aequoreus Fischer, p. 654, pi. XX, figs. 26-29. 
1863. “ “ Claus, p. 103. 
1868. “ “ Brady, p. 128, pi. IV, figs. 9-16. 
1878. “ “ Brady, p. 119, pi. XIX, figs. 8-10; pi. XXI, figs. 
10-17. 
1883. “ Dumasti Joly, p. 120, figs. 1-8. 
1883. “ aequoreus G. M. Thompson, p. 97, pi. XI, figs. 16-18. 
1888. “ Dumasti Richard, p. 67. 
1891. “ aequoreus Blanchard and Richard, p. 515. 
1891. “ “ Brady, p. 26, pi. X, fig. 1. 
1892. “ “ Lande, p. 173. 
1893. Hemicyclops aequoreus Claus, p. 348, pi. Ill, figs. 11-17. 
1893. Cyclops aequoreus Scott, p. 74. 
1895. “ “ Herrick, p. 122, pi. XXIII, fig. 5. 
1895. “ “ Scott, p. 33. 
1901. “ “ Lilljeborg, p. 102, pi. VI, figs. 17-19. 
Cyclops aequoreus was first recognized in our fauna by Her¬ 
rick. It is an inhabitant of brackish water. It has never 
appeared in any of my collections, but Mr. E. Foster tells 
me that he has collected it in Lake Ponchartrain and connect¬ 
ing waters. It seems likely that further collections in brack¬ 
ish waters will show that this is not an uncommon form. It 
is readily recognized hv the six segmented antennae of the 
female and the peculiar form of the fifth foot. 
