Earring & Myers—Rotifer Fauna of Wisconsin — II. 491 
The neck is well marked. The abdomen tapers rapidly and in¬ 
creasingly from the neck to the base of the foot; the lorica is 
fairly rigid and the plates are well marked; the lateral clefts are 
very narrow and parallel-sided. The foot is moderately long, coni¬ 
cal and rather small at the base; the tail is small and a little 
beyond mid-length. The toes are extremely long, straight and 
slender, slightly enlarged at the base and tapering very gradually 
to the minutely rounded tips; their length is about two fifths of 
the entire length. 
The corona is somewhat oblique and convex with prominent 
beaklike lips. 
The mastax is large and of the normal type; the fulcrum is 
relatively stout and slightly expanded posteriorly; the manubria 
slender, rodlike and slightly recurved, but not crutched. The 
gastric glands are small. 
The ganglion is long and pyriform; the eyespot is cervical, at 
the posterior end of the ganglion; no retrocerebral organ is present. 
Total length 120-125|Lt; toes 45-50/a. 
Cephalodella helone is not common; we have collected it among 
Fontinalis in a decadent lake two miles east of Eagle River, Vilas 
County, Wisconsin, and in a bog pool at Bargaintown, near At¬ 
lantic City, New Jersey. The appearance of the animal is at first 
somewhat puzzling, whether alive or dead: when swimming the 
toes are never separated and it looks very much like a diminutive 
Trichocerca (=Battulus); when death occurs, the toes are thrown 
out sidewise, thus resembling a small Monommata. It is probably 
related to C. cuneata, but readily distinguished by the presence of 
the eyespot, as well as by its peculiar behavior. 
CEPHALODELLA NANA Myers, new species. 
Plate XXIX, figure 1. 
The body is relatively short and conical, tapering evenly and 
gradually from the corona to the base of the toes; the dorsal edge 
is gently curved. The head is very large, nearly half the length of 
the entire body and much wider than the abdomen. The neck is 
well marked. The abdomen is very short, little more than one third 
of the length of the body and tapers gradually towards the foot; 
the lorica is moderately flexible and the plates distinct; the lateral 
clefts are narrowest near mid-length and wide at the posterior end. 
The foot' is fairly large and conical; the small tail is unusually far 
