Marring and Myers—The Rotifers of Wisconsin. 625 
thin plate rests on the manubrium, and at its extremity a stout, 
slightly curved piece is joined to it at a right angle. The inner 
surface of this curved section of the uncus is very closely set with 
minute, very slender spines, which no doubt play a part in tri¬ 
turating the food. The manubrium is less abnormal than usual 
in the genus; the ventral branch is very slender, but little shorter 
than the median branch and nearly parallel to it; the dorsal 
branch is broad and plate-like and curves strongly toward the 
median line. 
The epipharynx consists of a single piece of somewhat com¬ 
plex form; it is only imperfectly sclerified and dissolves rather 
rapidly in a solution of potassium hypochlorite of very moderate 
strength. The ventral section is a broad lamella, slightly rein¬ 
forced at the anterior edge and curved nearly in a semicircle, 
at the ends of which there is a deep sinus, reducing its width 
nearly to one half; at this point there is a rather sharp outward 
and downward bend of the external portion. 
The oesophagus is fairly long. The gastric glands and stomach- 
intestine are huge and nearly fill the entire body-cavity. The 
ovary is elongate and very large; the animal is remarkable for 
being viviparous, the only known instance among Notommatid 
rotifers; just before birth the embryo crowds all the intestines 
out of their normal positions, as it is fully half the length of the 
parent. The bladder is very small and a simple expansion of 
the cloaca. The foot glands are very small and terminate in a 
mucus reservoir almost as large as the gland. 
The ganglion is an enormous, broadly pyriform sac reaching 
fully half way down on the mastax. At its posterior end there 
is a very large eye-spot enclosed in a ductless, hemispherical re- 
trocerebral sac, which is tinted a deep red and filled with minute 
pigment granules. 
Total length 1000-1500/z; trophi 45 /i long, 48/x wide. 
Lindia tecusa occurs in abundance in a stagnant, shallow pool 
of brackish water at Margate, New Jersey. The pool is only a 
short distance from the ocean and receives salt water by seepage 
through the ground; during the summer it is filled with dense 
mats of Vaucheria thuretii, among which the rotifer lives. 
It is possible that this may be the animal described by Lie- 
Petterson as Notommata gravitata; with the small amount of ma¬ 
terial available to the author it is not surprising that his account 
40—S. A. L. 
