562 Wisconsin Academy of Sciences, Arts, and Letters. 
Notommata Ehrenberg 
notommata copeus Ehrenberg 
Plate XLI, figures 1-4 
Notommata copeus Ehrenberg, Abh. Akad. Wiss. Berlin (for 1833) 
1834: 213; Infusionsth. (1838), p. 434, pi. 51, fig. 1.— de Beauchamp, 
Arch. Zool. Exp. IV, 10 (1909): 97, 195, 334, figs. XIX, LVI, PI. 8, 
figs. 99-105.— Harking, U. S. Natl. Mus. Bull. 81 (1913): 78. 
Notommata centrura Ehrenberg, Abh. Akad. Wiss. Berlin (for 1833) 
1834: 211, 333, PI. 9, fig. 1; Infusionsth. (1838), p. 435, PI. 51, fig. 2. 
—Eeydig, Zeitschr. Wiss. Zool. 6 (1854): 33, PI. 3, figs. 21-25, 27.— 
Weber and Montet, Cat. Invert. Suisse, fasc. 11 (1918): 107. 
Copeus notommata Ehrenberg, Infusionsth. (1838), p. 441. 
Copeus ehrenJ)ergii Gosse, Hudson and Gosse, Rotifera (1886) 2: 28; 
ibid., Suppl. (1889), p. 19, PI. 32, fig. 17.— Calman, Ann. Scott. Nat. 
Hist. 1892: 242, PI. 8, fig. 2. —Skorikov, Trav. Soc. Nat. Kharkow 
30 (1896): 288.— Rousselet, Jour. Royal Micr. Soc. 1906: 403. 
Copeus labiatus Gosse, Hudson and Gosse, Rotifera (1886) 2: 26, PI. 16, 
fig. 1.— Weber, Rev. Suisse Zool. 5 2 (1897): 92, PI. 4, fig. 6; ibid. 
5 4 (1898): 453, PI. 18, figs. 8-10.— Stenroos, Acta Soc. Fauna et 
Flora Fennica 17 1 1898): 127, PI. 3, fig. 10.— Wesenberg-Lund, 
Vid. Medd. Nat. For. Kjobenhavn 1899, PI. 2, fig. 31.— Montet, 
Rev. Suisse Zool. 23 (1915): 321. 
Copeus americanus Peel, Microscope 10 (1890): 144, fig. 1. 
Copeus copeus Collin, Deutsch-Ost-Afrika 4 15 (1897): 5, fig. 3.— Jen¬ 
nings, Amer. Nat. 35 (1901): 741, PI. 4, fig. 69. 
Copeus centrurus Daday, Zoologica 44 (1905): 95; ibid. 59 (1910): 68. 
— von Hofstein, Arkiv. Zool., Stockholm 6 1 (1909): 14. — Voigt, 
Siisswasserfauna Deutschlands, pt. 14 (T912): 94, fig. 169. 
The body is elongate, nearly parallel-sided and truncate poster¬ 
iorly; its greatest width is a little less than one third of the total 
length. The integument is leathery and the outline quite constant; 
it is a fairly transparent species. 
The head segment is short, broad, and truncate anteriorly; 
its width is one half the greatest width of the body. The neck 
segment is fairly long and slightly enlarged posteriorly. The 
anterior transverse folds are well marked. The abdomen increases 
gradually in width for about two thirds of its length; from this 
point it diminishes rapidly and becomes truncate and rounded 
posteriorly. The tail is a long, round, conical projection, ab¬ 
ruptly reduced at mid-length and ending in a blunt point. The 
foot has two fairly long and broad joints; at the base of the 
toes the terminal joint has a small, knob-like projection with a 
