Harring (S; Myers—Rotifer Fauna of Wisconsin — II. 467 
The ganglion is very large and saccate. The retrocerebral organ 
is absent and the eyespot frontal and double, consisting of two 
closely approximated spheres of red pigment. 
Total length 105—110/x; toes 18—20/x; trophi 45ja. 
CepJialodella catellina is apparently of worldwide, but some¬ 
what erratic distribution; this is probably to be attributed to un¬ 
usually narrow limits of the conditions necessary for its existence; 
when these are satisfied, it will be found in great profusion. 
Diglena volvocicola Zavadovski is at least very closely related 
to C. catellina and probably identical with it; the figures given by 
the author do not show any differences that might be considered 
of specific value. Some physiological dissimilarities are described, 
the most striking one being the parasitism of the animal in Volvox 
colonies. The author suggests the alternative name catellina para¬ 
sitica for this form, if it should prove to be only a variety. 
CEPHALODULLA ANGUSTA Myers, new species. 
Plate XXVII, figure 2. 
The body is small, stout and gibbous dorsally. The head is very 
large, slightly deflexed, and strongly oblique anteriorly. The neck 
is indistinctly marked. The abdomen increases slightly in width 
for about two thirds of its length; the posterior third is rounded 
dorsally. The lorica is very flexible, but the plates well marked; 
the lateral clefts are fairly wide anteriorly and the edges diverge 
slightly and gradually towards the posterior end. The foot is small 
and conical with a minute tail somewhat beyond mid-length. The 
toes are very short, slender and slightly recurved, tapering grad¬ 
ually to acute points; their length is one sixth of the total length. 
The corona is strongly oblique and convex without projecting lips. 
The mastax is large and of the normal type; the fulcrum is 
slightly' expanded posteriorly, the manubria rodlike with ends 
strongly decurved, but not crutched. The gastric glands are small. 
The ganglion is very long and pyriform. The eyespot is frontal 
and double, the two halves very close together; the retrocerebral 
organ is absent. 
Total length 90-95/x; toes 15-18jit. 
Cephalodella angusta is not common; we have collected it only 
in a large pond at Oceanville, New Jersey, among Biccia and float¬ 
ing sphagnum in soft, acid water. 
