528 Wisconsin Academy of Sciences, Arts, and Letters, 
testine. The bladder is large. The foot glands are very long and 
slender, extending almost the entire length of the foot. 
The ganglion is relatively small and saccate. The retrocerebral 
sac is rudimentary and fused to the lower surface of the ganglion. 
Two small subcerebral glands are present; in the young animals 
they contain bacteroids and are consequently opaque, but v/ith 
age they gradually become transparent. The two eyespots are on 
small knobs on the apical plate, a short distance below and outside 
the arc of cilia limiting the buccal field dorsally. 
Total length 500-600/x; toes 30-35/^; trophi 70/x long, 60/x wide. 
Enteroplea lacustris is widely, but somewhat sporadically dis¬ 
tributed; where it does occur, it is usually present in enormous 
numbers. It is very often found in company with Epiphanes 
{= Notops) clavnlata, although they are not to be considered in¬ 
separable. 
Genus EOTHINIA Harring and Myers. 
Notommatid rotifers with moderately elongate, fusiform, illori- 
cate body, a distinct neck segment separating head and abdomen; 
the tail is moderately large or rudimentary, the foot two-jointed 
and short; the toes are rather short. 
The corona is obliquely frontal and may have a ventral chin; 
the marginal cilia are fairly short except on two lateral, auricle¬ 
like areas. 
The mastax is virgate, but somewhat specialized; the inner*' edges 
of the rami are provided with numerous short, closely spaced, 
needlelike teeth; the piston is well developed. 
The retrocerebral organ is well developed; both sac and glands 
are present; there is a cervical eyespot at the posterior end of the 
ganglion and two frontal eyespots on the apical plate. 
Type of the genus.—Eothinia elongata (Ehrenberg) ^ Eosphora 
elongata Ehrenberg. 
EOTHINIA TEIPHAEA Harring and Myers, new species. 
Plate XLI, figures 1-5. 
The body of this species is fusiform and moderately elongate; 
its greatest width is about one fourth of the total length. The in- 
