1102 Wisconsin Academy of Sciences, Arts, and Letters. 



The bicolor of Miss Byrnes has antennae of twelve segments 

 and must be considered as varicans. 



Because of the very close resemblance of this species to 

 bicolor one cannot help being a little skeptical in regard to 

 some of these recorded occurrences, in spite of the fact that it 

 might be expected to be a member of the American copepod 

 fauna. 



CYCLOPS BICOLOR Sars. 

 Plate LXXX, figs. 7-9: Plate LXXXI, figs. 1 and 2. 



1863. 



Cyclops bicolor Sars, p. 253. 



1880. 



" " Rehberg, p. 547. 



1884. 



Herrick, p. 160, pi. R, fig. 12. 



1885. 



Daday, p. 246. 



1885. 



" brevisetosus Daday, p. 255, pi. Ill, figs. 3, 5 and 10. 



1887. 



" diaphanus Herrick, p. 16, pi. VII, figs. 3 a-e. 



1888. 



bicolor Lande, p. 67, pi. XVIII, figs. 91-98. 



1891. 



" Schmeil, p. 34. 



1892. 



Schmeil, p. 118, pi. VI. figs. 6-13. 



1892. 



" " Lande, p. 165. 



1893. 



" Marsh, p. 217. 



1895. 



" Herrick, p. 118, pi. XVIII, figs. 3-3e, pi. XXI, fig. 12 



1895. 



Marsh, p. 20. 



1901. 



" Lilljeborg, p. 78, pi. IV, figs. 27 and 28. 



1903. 



" Graeter, p. 533, pi. 15, figs. 34-36. 



Cephalothorax oval, its breadth being slightly more than one- 

 half its length. The first segment comprises considerably more 

 than one half of the cephalothorax. The cephalothorax is 

 rather more than twice as long as the abdomen exclusive of 

 the f ureal rami. The fifth cephalothoracic segment bears 

 upon each side a long seta. 



The first abdominal segment (Plate LXXXI, fig. 1) is 

 somewhat enlarged anteriorly and equals in length the re- 

 mainder of the abdomen exclusive of the furcal rami. The last 

 segment is armed with small spines on the ventral surface and 

 is coarsely dentate on the dorsal surface. 



The furcal rami do not equal the length of the last two 

 abdominal segments. The lateral seta is at about three^fourthfl 



