450 Wisconsin Academy of Sciences, Arts, and Letters. 
ganglion at the level of the eyespot without any distinct junc¬ 
tion line. 
Total length 275-300/>i; toes 45-50ja; trophi 40,u. 
Notommata doneta is rare; we have found only a few specimens 
in Starvation Lake, about 4 miles south of Eagle Kiver, Vilas 
County, Wisconsin, and at Oceanville, near Atlantic City, New 
Jersey. Its closest relatives are N. aurita, N. cyrtopus and N. tel- 
mata; the unusually long and peculiar toes are sufficient to dis¬ 
tinguish it from these species. 
NOTOMMATA TITHASA Harring and Myers, new species. 
Plate XXIII, figures 1-5. 
The body is elongate, spindle-shaped and slender; its greatest 
width is about one fifth of the total length. The integument is 
very fiexible and the outline is constantly changing in response 
to the contractions of the animal. The entire body is transparent, 
but has a very faint yellowish tinge. 
The neck is very slightly constricted, but no anterior transverse 
folds are present. The head is rather small and triangular in* 
dorsal view on account of a large, slightly obtuse rostrum. The 
abdomen increases very gradually in width for about three fourths 
of its length and then tapers somewhat more rapidly to a broad 
tail projecting very slightly from the body. The foot is stout, 
fairly long and obscurely wrinkled. The toes are very long and 
stout, incurved and decurved; the ventral edge does not curve 
evenly, but is faintly indented near the tip and a short distance 
from the base. Their length is one eighth of the total length. 
The dorsal antenna is a small setigerous papilla in the normal 
position; the lateral antennae are somewhat farther back than 
usual. 
The corona has two large, strongly ciliated areas corresponding 
to the auricles of other Notommatids, but not evertile. The buccal 
field is evenly ciliated and continues down on the ventral side of 
the body for about one fourth of its length, forming posteriorly 
a slight chin. The dorsal arc of the eircumapical band has dis¬ 
appeared. 
The mastax is of a very simple virgate type and the trophi 
very small. The fulcrum is rodlike and very slender, slightly 
curved posteriorly^ The rami are triangular and without denticu- 
lations on the inner margins, which do not quite meet, but enclose 
