584 Wisconsin Academy of Sciences, Arts, and Letters. 
ovary, and bladder are normal. The foot glands are large, pyri¬ 
form, and compressed laterally. 
The retrocerebral sac is pyriform and fairly large; it opens 
on the corona through a long, tubular duct and is filled with bac- 
teroids, which render it opaque to transmitted light. The sub¬ 
cerebral glands are vacuolate and partly fused with the fairly 
large, saccate ganglion, which has a small eye-spot at its posterior 
end. 
Total length 150-175/a; toes 22-26/a; trophi 32/a. 
Notommata cyrtopus is common everywhere in weedy ponds. 
It is readily recognized by the opaque retrocerebral sac and the 
long, curved toes. Considerable variation is found in the stout¬ 
ness of the body; the specimen figured may be taken as represent¬ 
ing the maximum, and it is usually much more slender. 
Notommata Telmata Harring and Myers, new species 
Plate XLIX, figures 1-4 
The body is slender and spindle-shaped, its greatest width be¬ 
ing about one fourth of the total length. The integument is 
moderately rigid and the outline remains fairly constant. It is 
not very transparent. 
The width of the head segment is slightly greater than its 
length, or very nearly two thirds of the greatest width of the 
body; the neck segment is of the same length, but slightly wider. 
The anterior transverse folds are well marked. The abdomen 
increases very slightly in width for about two thirds of its length 
and is rounded posteriorly. The tail is inconspicuous and has a 
single, median, rounded lobe. The foot is two-jointed; the ter¬ 
minal joint is considerably smaller than the first joint. The toes 
are of unusual form; the basal section is straight and extremely 
short, and the posterior portion is long and slender, curved out¬ 
wards and downwards, with a distinct heel at its junction with 
the basal section. Their length is about one twelfth of the total 
length. 
The dorsal and lateral antennae are small setigerous papillae 
in the normal positions. 
The corona extends down the ventral side about one fourth of 
the length of the body; the post-oral portion projects from the 
