570 Wisconsin Academy of Sciences, Arts, and Letters. 
glands. The ganglion is small and saccate, with the transversely 
elongate eye-spot at the posterior end. 
Total length 600-750/a; toes 25-32/a; trophi 100 y . 
Notommata collaris does not appear to be common; we have 
found it only among submerged mosses in Lake Kathan, about 5 
miles from Eagle River, Yilas County, and in a small pond near 
Minocqua, Oneida County, Wisconsin; at the time the last-named 
collection was made, there was very little water in the pond, but 
there were great masses of algae in conjugation. 
This species is closely related to Notommata pachyura; it is 
readily distinguishable by the much smaller tail and the very short 
toes. 
Notommata falcinella Harring and Myers, new species 
Plate XLV, figures 8-12 
The body is moderately slender and spindle-shaped, its greatest 
width being somewhat less than one third 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 nearly equal to its length, 
approximately one half the greatest width of the body; the neck 
segment is of the same length, but slightly wider, nearly two 
thirds of the body width. The anterior transverse folds are well 
marked. The abdomen increases very slightly in width to a point 
about mid-length, and from there tapers gradually to the tail, 
which is three-lobed, with a large median lobe, rounded poste¬ 
riorly, and two small lateral lobes. At the base of the indenta¬ 
tion separating the lobes there is a minute additional lobe. The 
foot has two joints, the posterior considerably smaller than the 
anterior; it terminates in a short, recurved spur, projecting over 
the toes, which are rather slender, conical, and obtusely pointed; 
their length is about one sixteenth of the total length. 
The dorsal and lateral antennae are small setigerous papillae 
in the normal positions. 
The corona extends down on the ventral side about one third 
the length of the body; the post-oral portion projects from the 
body as a fairly prominent chin. The auricles are rather short 
and quite stout, with an abundance of robust cilia, continuous 
with the coronal eiliation. 
