Harring & Myers—Rotifer Fauna of Wisconsin — II. 427 
a slight transverse fold; this corresponds to the rostrum of the 
forcipate Notommatids. There is no distinct neck. The abdomen 
is nearly cylindric in its anterior half; from there it tapers grad¬ 
ually to an inconspicuous tail. The foot is short and relatively 
slender, continuing the general spindle-shaped outline of the body; 
it has two joints of nearly equal length. The toes are moderately 
long, about one twelfth of the total length, slender, conical and 
slightly decurved. 
The dorsal antenna is a small setigerous papilla in the normal 
position; the lateral antennae have not been observed. 
The corona is oblique and has two strongly ciliated areas corre¬ 
sponding to the auricles of other Notommatids. The ciliation of 
the buccal field does not extend beyond the mouth; the circumapi- 
cal band has disappeared, as in the forcipate Notommatids. 
The mastax is closely related to the malleate type. The incus is 
straight; on the upper side of the fulcrum is a broad rib, which 
curves around the end and continues for a very short distance on 
the lower side; the web is thin and lamellar. The rami are triangu¬ 
lar and decurved at their posterior ends; the inner edges do not 
come into contact. The unci have only a single tooth, expanded 
into a triangular basal plate, into which it gradually merges with¬ 
out quite reaching the malleus; this has a very small basal plate 
and a rod-shaped main stem, which at the posterior end is curved 
diagonally forwards and inwards. The epipharynx consists of two 
sigmoid plates with a slender rib on the lower edge; they are im¬ 
bedded in the walls of the mastax near the base of the rami. The 
piston seems to be very weak; it is attached to the anterior wall of 
the mastax and not to the fulcrum. Two huge, vacuolate salivary 
glands, each nearly as large as the mastax itself, are attached to it 
by a short, narrow neck. 
The oesophagus is very long and slender. The gastric glands 
are large and filled with highly refractive globules. The stomach 
is not separated from the intestine. The ovary of the free-swim¬ 
ming female is normal. 
The ganglion is very large and saccate. A retrocerebral sac 
appears to be present, but no duct has been observed. The eyespot 
is at the posterior end of the ganglion. 
Total length 140-175/x; toes ll-ld^a; trophi 18 wide, 12fji long. 
Proales werneckii is parasitic in galls on various species of 
Vaucheria. The free-swimming young, to which the description 
