Earring & Myers—Rotifer Fauna of Wisconsin — II. 537 
The dorsal antenna is a small setigerons papilla in the normal 
position; the lateral antennae are on the posterior fourth of the 
body. 
The corona is very slightly oblique and consists of a marginal 
wreath of cilia with lateral, auricle-like tufts of longer cilia for 
propulsion; the apical plate is unciliated and the buccal field 
evenly covered with short, close-set cilia. 
The mastax is of a modified virgate type. The fulcrum is long 
and slender and tapers gradually towards the posterior end. The 
rami are triangular at the base and bent near mid-length at an 
approximately right angle; the dorsal portion is long, slender, 
tapering and slightly incurved. Each ramus has at the angle a 
long, slender tooth, interlocking with its mate on the opposite side. 
The right uncus has three very long, slender teeth, the posterior 
resting on the tip of the ramus, the two anterior on the ramus just 
below the inner tooth; the left uncus has two teeth, one resting on 
the posterior tip of the ramus and the other just below the inner 
tooth. The manubria are broad and lamellar, ending in a rod¬ 
shaped posterior portion, slightly recurved at the end. The piston 
is large, but apparently not very powerful. 
The oesophagus is rather short. The gastric glands are small 
and rounded. There is no constriction between stomach and in¬ 
testine. The ovary and bladder are normal. The foot glands are 
very small and pyriform. 
The ganglion is moderately large and saccate. The retrocerebral 
sac is small and apparently ductless; it contains a small number 
of transparent, globular bodies and can not be stained. Near mid¬ 
length of the ganglion are two small, rounded masses representing 
the subcerebral glands, indicated in the figures, but invisible with¬ 
out intra-vitam staining. The eyespot is at the posterior end of 
the ganglion. 
Total length 200-250/a; length of body 75-95/a; length of right 
toe 125-155/a; left toe two thirds to four fifths of right toe; 
trophi 18/a. 
Monommata longiseta is abundant everywhere in weedy ponds 
all over the world. 
Muller ^s Cercaria orMs was undoubtedly a contracted Monom¬ 
mata. Accepting as fact the frequently asserted identity of the 
two ^ Varieties' in every respect except size, the species was listed 
as Monommata orhis by Harring in the Synopsis of the Rotatoria 
