Harring & Myers—Rotifer Fauna of Wisconsin — II. 423 
may be dorsal. The buccal field is large and evenly ciliated; the 
mouth is at the ventral margin. 
The mastax is a modification of the malleate type; the piston is 
small and not attached to the fulcrum, but to the ventral wall of 
the mastax. The fulcrum is short and nearly in a straight line 
with the flat, roughly triangular rami, which are usually dentate 
on the inner edges and have large basal apophyses. The manu- 
bria are as long as in the normal virgate mastax; the unci have 
four or more well-developed teeth. The epipharynx consists of 
two very irregularly shaped pieces, imbedded in the walls of the 
mastax at the sides of the mouth. 
The retrocerebral organ is rudimentary or absent. The eyespot 
is usually cervical, rarely frontal or absent. 
Type of the genus, —Proales decipiens {'EihYenloerg)=Notommata 
decipiens Ehrenberg. 
We have not seen Proales aureus Zavadovsky, parasitic in col¬ 
onies of Volvox aureus, or P. quadrangular is (Glasscott) ; Dr. E, 
Penard kindly sent us a slide with a balsam-mounted specimen of 
his P. latrunculus, but we did not succeed in isolating the trophi 
of the contracted specimen. A number of species, so poorly de¬ 
scribed that there is little hope of identifying them, have been re¬ 
ferred to this genus. They are listed here only to complete the 
record. 
Proales aureus Zavadovsky, Uchen. Zap. Moskovsk. Gor. Univ. Shaniavskago, 
vol. f, 1916, p. 278, pi. 4, figs. 1-9. 
Proales algicola Kellicott, Trans. Amer. Micr. Soc., vol. 19, 1897, p. 48 
[= Cephalodella catellina (Muller) ?] 
Proales coryneger Gosse, Journ. Eoyal Micr. Soc., 1887, p. 863, pi. 14, fig. 4.— 
Hudson and Gosse, Eotifera, Suppl., 1889, p. 24, pi. 31, fig. 10. 
Proales inflata Glasscott, Proc. Eoyal Dublin Soc., new ser., vol. 8, 1893, p. 
51, pi. 4, fig. 1. 
Proales latrunculus Penard, Mikrokosmos, vol. 2, 1909, p. 142, figs. 1-7. 
Proales micropus (Gosse). 
Furcularia micropus Gosse, in Hudson and Gosse, Eotifera, 1886, vol. 2, p. 
46, pi. 19, fig. 2. 
Proales micropus Jennings, Amer. Natural., vol. 35, 1901, p. 743, pi. 5, fig. 
82. 
Proales otJiodon, Gosse, Journ. Eoyal Micr. Soc., 1887, p. 366, pi. 8, fig. 11.— 
Hudson and Gosse, Eotifera, Suppl., 1889, p. 24, pi. 31, fig. 11. 
Proales prehensor, Gosse, Journ. Eoyal Micr. Soc., 1887, p. 366, pi. 8, fig. 12.— 
Hudson and Gosse, Eotifera, Suppl., 1889, p. 24, pi. 31, fig. 12. (—Lecdne 
depressa Bryce?) 
