Earring and Myers—The Rotifers of Wisconsin. 641 
time of the construction of Potomac Park, in Washington, District 
of Columbia. The surface was covered with Euglena in an un¬ 
broken layer; the only other rotifer present was the spinous form 
of Epiphanes (= Notops) brachionus, but both occurred in enor¬ 
mous numbers. 
Eosphora therina swims with remarkable speed and in an al¬ 
most straight line; it will dart from the surface to the bottom of 
a column of water five inches high in a fraction of a second. While 
it has a considerable external resemblance to E. ehrenbergi and 
almost identical trophi, the two species are not easily confused; 
E. ehrenbergi is of an almost opaque orange-brown color, while 
E. therina is as transparent as an Asplanchna, and the small tail 
and tapering foot with clawed toes are sufficient to distinguish it 
from the former, which has a nearly cylindric foot, a prominent 
tail, and clawless toes. 
Eosphora Anthadis Harring and Myers, new species 
Plate LVIII, figures 9-13 
The body of this species is broad and very robust; its greatest 
width, at mid-length, is one third of the total length. The in¬ 
tegument is soft and flexible, but the outline is quite constant. 
The entire body is very transparent. 
The head is short and very broad; the neck is a slight constric¬ 
tion, marked with an indistinct fold, between the head and the 
abdomen. The very large and stout abdomen tapers slightly from 
a point about mid-length to the base of the very broad foot. There 
is no distinct tail. The foot is conical and without any joints, 
but with some faint wrinkles. In a dorsal view the external 
border of the very short toes forms almost a semicircle; they are 
strongly compressed dorso-ventrally, so that when seen from the 
side they appear as nearly normal, conical toes; the length is 
about one twentieth of the total length. 
The corona is frontal and consists of a marginal wreath of 
cilia, interrupted dorsally and passing in a curve to the lateral 
angles, where it joins an inner circle starting also from the dorsal 
gap; from the angles the corona continues as a single band, closed 
ventrally and passing immediately below the mouth. The buccal 
field is very faintly ciliate. 
41—S. A. L. 
