Marsh—North American Species of Cyclops . 1101 
pools, and is world wide in its distribution, although not abun¬ 
dant anywhere. 
The question of the identity of our form with that of Europe 
has been discussed by Schmeil, and I think we must agree 
with his conclusion. Really the only reason for separating 
our form is the fact that it ordinarily has eleven segments in 
the antenna. If we recognize this as a specific difference we 
feho'uld call the American form perarmatus Cragin. 
CYCLOPS VARICANS Saks. 
1862. Cyclops varicans Sars, p. 252. 
1875. 
1890. 
1891. 
1892. 
1892. 
1893. 
1895. 
orientalis Uljanin, pp. 33-34, pi. VII, figs. 10 and 11; pi. X, 
figs. 8-13; pi. XI, figs. 1 and 2. 
varicans Lande, p. 64, pi. XVIII, figs. 81-90. 
Schmeil, p. 33. 
Lande, p. 164. 
Schmeil, p. 116, pi. VI, figs. 1-5. 
Richard, p. 8. 
Herrick, p. 116, pi. XIX, figs. 12-13; pi. XXX, 
1895. 
1897. 
1897. 
1897. 
1901. 
1903. 
1905. 
1906. 
1909. 
figs. 2-8. 
“ Richard, p. 1. 
“ Forbes, pp. 63-64. 
“ Matile, p. 130, pi. II, fig. 17. 
“ Scott, p. 322, pi. IX, figs. 26-28. 
“ Lilljeborg, p. 72, pi. IV, figs. 23, 24. 
“ Graeter, p. 528, pi. XV, figs. 22, 25. 
“ Van Douwe, p. 682. 
“ Pearse, p. 249. 
bicolor Byrnes, p. 29, pi. XIII, figs. 1-5. 
This is a species of world wide distribution, and it would 
be expected in our American fauna. I have never found it in 
any of the collections that have come under my observation. 
It is mentioned by Herrick, E. B. Forbes and Pearse as being 
found in America. Herrick states that he found it but once. 
His figures are not exact, but he gives twelve segments in the 
antenna of the female which should distinguish it from the 
closely related form bicolor . Forbes speaks of it as fairly 
common in America, but he gives neither description nor figures. 
Pearse states that he found it on Nantucket Island, but he 
too, gives neither description nor figures. 
8—S. & A.—3 
