Harring & Myers—Rotifer Fauna of Wisconsin — 11, 513 
The neck is marked by a slight constriction. The abdomen is very 
short and abruptly truncate posteriorly; the lorica is very flexible, 
and the dorsal and ventral plates separated by a very wide cleft. 
The foot is indistinct and the tail very small. The toes are short, 
stout and blade-shaped; the dorsal edge is decurved and the 
ventral nearly straight, with a slightly decurved, clawlike tip; 
their length is about one sixth of the total length of the body. 
The corona is slightly oblique without projecting lips. 
The mastax is huge, but of the normal type of the genus; the 
fulcrum is slightly expanded and decurved at the posterior end; 
the manubria are slender and rodlike. The total length of the 
mastax is fully half the length of the body. 
The ganglion is very large and saccate; there is no eyespot and 
no trace of the retrocerebral organ. 
Total length 130-140/x; toes 22-24/x. 
Cephalodella lipara was collected among floating sphagnum in 
a ditch with soft, acid water, about five miles north of Egg Harbor, 
New Jersey. It has a superficial resemblance to C. physalis, but is 
readily distinguished by the short toes, very stout body and the 
absence of the eyespot. 
Genus DORYSTOMA Harring and Myers. 
Notommatid rotifers with short, stout, gibbous, illoricate body, 
with a distinct constriction between head and abdomen; the foot 
is very short and apparently two-jointed; the toes are short and 
decurved; at the base of the foot there is a short spine. 
The corona is oblique and consists of a marginal wreath of cilia 
with lateral, auricle-like tufts of cilia adapted to propulsion. 
The mastax is a specialized form of the virgate type; the trophi 
are modified as supports for the walls and a highly specialized 
epipharynx is present and serves to pierce the body wall of the 
prey by projection through the mouth. 
The eyespot is single and at the posterior end of the ganglion 
Type of the genus.—Dory stoma caudata (Bilfinger) = Proales 
caudata Bilfinger. 
This species was listed in volume twenty as a member of the 
Wisconsin rotifer fauna on the strength of a preliminary identi¬ 
fication, which later proved to be incorrect. However, enough is 
