454 Wisconsin Academy of Sciences, ArtSy and Letters. 
but is readily distinguished by its smaller size and short toes, as 
well as by the differences in the trophi. 
TAPHBOCAMPA SELENUBA Gosse. 
Plate XXIV, figures 5-9. 
Taphrocampa selenura Gosse, Journ. Eoyal Micr. Soc., 1887, p. 1, pi. 1, fig. 
1.— Hudson and Gosse, Rotifera, Suppl., 1889, p. 20, pi. 31, fig. 5.— ^Wier- 
ZEJSKI, Eozpr. Akad. Umiej., Wydz. Mat.-Przyr., Krakow, ser. 2, vol. 6, 
1893, p. 227.— Weber, Eev. Suisse Zool., vol. 5, 1898, p. 436, pi. 17, figs. 
14, 15.— Voigt, Porschungsber. Biol. Stat. Plon, vol. 11, 1904, p. 38; 
Susswasserfauna Deutschlands, pt. 14, 1912, p. 92, fig. 166.— ^Voronkov, 
Trudy Hidrobiol. Slants. Glubokom Oz., vol. 2, 1907, p. 95.— Montet, Eev. 
SuissQ Zool. vol. 23, 1915, p. 325.— Weber and Montet, Cat. Invert. Suisse, 
pt. 11, 1918, p. 106. 
Taphrocampa viscosa Levander, Acta Soc. Fauna et Flora Fennica, vol. 12, 
No. 3, 1895, p. 26, pi. 2, fig. 14 .—Stenroos, Acta Soc. Fauna et Flora 
Fennica, vol. 17, No. 1, 1898, p. 123. 
The body is elongate, slender and very nearly cylindric, taper¬ 
ing slightly to the foot; its greatest width is about one fifth of 
the total length. The integument is leathery and almost semi- 
loricate; its surface is viscous and usually covered with adhering 
particles of floccose material. 
There is no distinct separation between the head and abdomen; 
both are transversely plicate, about eleven ridges in the entire 
length, of which three may be considered as belonging to the head. 
The plications do not form rings around the body; the lateral 
ridges alternate with those on the dorsal surface and meet them 
in a “ bellows’’-fold. The ventral surface is very faintly plicate. 
The tail is slightly narrower than the body and rounded poste¬ 
riorly; it is separated from the abdomen by a deep transverse 
groove. The foot is rudimentary, the anus opening just above the 
toes; these are long, slender, tapering and decurved; they are far 
apart at the base and form nearly a semicircle, when seen from 
the dorsal or ventral side; their length is about one ninth of the 
total length. 
The dorsal antenna is a minute setigerous pit in the normal po¬ 
sition; the lateral antennae have not been observed. 
The corona is strongly oblique and extends down on the ventral 
side for nearly one third of the length of the body; there is no 
chin. The auricles are small and rounded; the ciliation is con¬ 
tinuous with the corona. The mouth is a little below the center. 
