536 Wisconsin Academy of Sciences, Arts, and Letters. 
Notommata longiseta Ehrenberg, Abh. Akad. Wiss. Berlin, 1830, p. 46; In- 
fusionsthierchen, 1838, p. 432, pi. 53, fig. 2. 
Notommata longiseta aequalis Ehrenberg, Abh. Akad. Wiss. Berlin (for 
1831), 1832, p. 134. 
Notommata longiseta inaequalis Ehrenberg, Abh. Akad. Wiss. Berlin (for 
1831) 1832, p. 134. 
Notommata aequalis Ehrenberg, Abh. Akad. Wiss. Berlin (for 1831) 1832, 
p. 134; Infusionsthierchen, 1838, p. 432, pi. 53, fig. 3. 
Scaridium longisetum Schoch, Mier. Thiere Sussw.-Aquar., 1868, p. 30. 
Monommata longiseta Bartsch, Jahresh. Naturk. Wiirttemberg, vol. 26, 1870, 
p. 344.— Eyferth, Einf. Lebensf., 1878, p. 84, pi. 5, fig. 12; 1885, p. 109, 
pi. 7, fig. l2.— Bergendal, Acta Univ. Lundensis, vol. 28, 1892, sect. 2, 
No. 4, p. 75, pi. 1, fig. 14.— Stenroos, Acta Soc. Fauna et Flora Fennica, 
vol. 17, No. 1, 1898, p. 134.— Voigt, Forschungsber. Biol. Stat. Plon, 
vol. 11, 1904, p. 45; Siisswasserfauna Deutschlands, pt. 14, 1912, p. 104, 
fig. 193.— Lucks, Eotarienfauna Westpreussens, 1912, p. 54.— Montet, 
Rev. Suisse Zool., vol. 23, 1915, p. 324.— Jakubski, Rozpr. Wiad. Muz. 
Dzieduszyckich, vol. 1, No. 3-4, 1915, p. 18.— ^Weber and Montet, Cat. 
Invert. Suisse, pt. 11, 1918, p. 118. 
Monommata aequalis Eyferth, Einf. Lebensf., 1878, p. 84; 1885, p. 109. 
—Voigt, Siisswasserfauna Deutschlands, pt. 14, 1912, p. 104, fig. 194. 
Furcularia aequalis Hudson and Gosse, Eotifera, 1886, vol. 2, p. 46, pi. 18, 
fig. 5. 
Monommata orlis Harring, Bull. 81 U. S. Nat. Mus., 1913, p. 72. 
The body of this species is slender, elongate ovate and spindle- 
shaped; its greatest width is less than one fourth of the length. 
The integument is very flexible, but the outline is fairly constant. 
The entire body is very transparent. 
The head segment is relatively short and broad; the length is 
slightly greater than the width. It is separated from the abdomen 
by a well marked constriction. The abdomen is elongate and ovate, 
slightly gibbous dorsally and rounded posteriorly; the integument 
is covered with minute, interrupted, very closely spaced longi¬ 
tudinal striae. The foot is short, stout and obscurely two-jointed. 
The toes are extremely long and unequal; the left toe is always 
shorter than the right, but the relative length is variable, the usual 
proportion being four to five, but may be as much as one to two 
and individuals are occasionally found with nearly equal toes. 
The basal portion of the toes is fairly stout and very nearly cylin- 
dric, tapering gradually to the cylindrical, extremely slender 
posterior portion, which is fully half the length of the entire toe. 
The right toe is virtually straight and in the axis of the body; 
the left toe curves slightly upwards and to the left. 
