Harring (& Myers—Rotifer Fauna of Wisconsin — II. 457 
Taphrocampa clavigera' was collected by Stokes at Trenton, New 
Jersey; our material is from Bargaintown, near Atlantic City, 
where it occurs occasionally in small numbers. While without the 
pronounced, permanent annulations of T. annulosa and selenura, 
it is evidently closely related to these two species; the mastax 
differs only in details from that of T. annulosa. 
Genus DBILOPHAGA Vejdovsky. 
Notommatid rotifers with elongate, slender, spindle-shaped, 
illoricate body, usually without distinct separation of head and 
body and with very flexible integument; the head is cylindric and 
elongate, with the mouth at a considerable distance from the front; 
the tail is rudimentary and the foot very short and apparently 
unjointed; the toes are minute and conical. 
The corona is reduced to a simple, circumapieal ring of cilia. 
The mastax is virgate and the trophi of very simple form, usually 
protrusile and adapted as organs of attachment to the body of the 
host; rami large and strongly curved, without denticulation on 
the inner margin; mallei slender and rodshaped, unci reduced 
to small, oval plates; salivary glands very large. 
Neither retrocerebral organ nor eyespot are present. 
At least two of the species are ectoparasitic on oligochaete 
worms; the third species appears to be free-living. 
Type of the genus.—Brilophaga Bucephalus Vejdovsky. 
This genus includes, in addition to D. judayi, described in vol¬ 
ume twenty, two other species, listed below. Neither has been 
studied by anybody but the original discoverer. 
Brilophaga bucephalus Vejdovsky, Sitzungsber. Bohm. Ges. Wiss. Prag (for 
1882), 1883, p. 390, pi. 1, figs. 1-8.— De Beauchamp, Bull. Soc. Zool. France, 
vol. 29, 1904, p. 157, figs. A, B. 
Brilophaga delagei De Beauchamp, Bull. Soc. Zool. France, vol. 29, 1904, p. 
159, fig. C; vol. 30, 1905, p. 121, fig. 3. 
Genus PLEUROTROCHA Ehrenberg. 
Notommatid rotifers with short, stout, illoricate, ovoid or globose 
body, with a distinct neck separating the head and abdomen; the 
foot is long and cylindric or slightly tapering; the toes are very 
short and conical and may be either separate or fused. 
