OF DENISON UNIVERSITY. 
^>5 
This species is found in ponds containing plant life. Sessile 
vorticellidae are often found attached to the lorica of this species. 
Sometimes they are situated at the cephalad extremity of the lorica, 
evidently appropriating a portion, of the food attracted by the cilia of 
the Brachionus ; while in other cases these vorticellidae are attached 
to other parts of the lorica. 
Sp. 25. Brachionus militaris, Ehrenberg. 
Brachionus militaris, * Hudson and Gosse, The Rotifera 
or Wheel-animalcules; sup., p. 52; pi. XXXIV, fig. 23. 
Brachionus militaris, C. L. Herrick, Bull. wSci. Lab. of 
Denison Univ,, Vol. I, p. 56; pi. X, fig. 10. 
During mid summer this species was abundant in all of our weedy 
pools. It seems to be fond of wallowing in the debris that is found 
at the bottom of such pools. 
Sp. 25. Brachionus tuber cuius, 
[Plate I; Fig. 6.] 
Lorica sub-rectangular, slightly wider than long (spines excluded), 
warted. The cephalo-dorsad margin is supplied with six teeth. The 
middle teeth are much larger than any of the others. Next in size 
come the lateral teeth. Between the two middle teeth there is a nar- 
row, concave excavation. The cephalo-ventrad margin of the lorica 
is feebly convex. This margin is supplied with four small, sub-equal 
crenations. Two of these are situated, one near each lateral surface 
of the lorica ; the remaining two are located near the meson. Be- 
tween the two sub-median crenations there is a shallow concave exca- 
vation. The laterad margins of the lorica are convex. The caudad 
margin is straight. At its corners it is supplied with two long spines ; 
these spines are more than half the length of the body of the lorica. 
The orifice for the protrusion of the foot is guarded by two small, 
unequal spines. 
The whole lorica is densely covered with small tubercles, hence 
the name. These tubercles are found even upon the larger teeth of 
the cephalad margin and upon the spines. In a few individuals the 
spines appeared to be unwarted. The foot is very flexible. 
During mid-summer this species was very abundant around the 
roots of the duckweeds (Lemnacea polyrrhha^ L.), of one of our larger 
ponds. 
