1890. ] Zoology. 189 
Voice of Hyla andersonii.—The specimen of this beautiful 
batrachian referred to by Dr. Peters in the January Naturauist is still 
in excellent health, and occasionally utters its characteristic cry, which 
should not be described by the word “ peep,” for this suggests a simi- 
larity to the cry of the Pickering’s Hyla, which shrilly ‘‘ peeps.” The 
andersonii utters a single note, better described by the syllable ‘‘ keck,’’ 
which it usually repeats three or four times. It is not a frog-like note 
at all, but much resembles the call of the Virginia rail (Rallus virgin- 
tanus). If the collector follows up any ‘‘ peeper’’ in the marshes, he 
will not discover additional specimens of Myla andersonit.—CHARLES 
C. ABBOTT. 
The Trochlearis Nerve in Lizards.—Contrary to his earlier 
view, Hoffman now finds (Zoö?. Auz., No. 310) that the trochlearis of 
the lizard at an early stage possesses a ganglion, and that it in all re- 
spects resembles one of the truly segmental nerves. This ganglion 
aborts at about the time of the deposition of the retinal pigment. He 
asks the question if this is not to be regarded as the first segmental 
nerve of the hind brain? In snakes, birds, and teleosts he finds no 
anglion at any stage of development. He also suggests that the 
present distribution of the trochlearis may be secondary, and that 
formerly it was connected possibly with the occluding = of the 
parietal eye. 
Bats in the Wyandotte Cave, Indiana.—In the summer thou- 
sands and tens of thousands of bats assemble in Wyandotte cave, in 
Crawford county, and in other caves. A man living near Wyandotte 
cave, who had observed them for years, said that frequently in the early 
dusk of evening, he had seen a column of these flying animals from 
thirty to sixty feet in width and from two to three miles in length move 
from the mouth of the cave in a straight line going in a northwesterly 
direction. In a short time another column would move toward 
another point of the compass, and then perhaps another, each as long 
as the first, and, as long as within his observation, without straggling, 
and guided as by some reason or instinct that led these small-brained 
creatures to a known haunt or point. In the morning they would re- 
turn, not in solid column, as they departed, but in large flocks or _ 
droves, passing into the cave, where they would be seen no more until 
the next evening. ‘‘ Faneuil Hall” is a spacious corridor in Wyan- 
dotte cave, forty feet wide and eighteen to twenty feet high. Here 
daylight ends and darkness begins. Here we see the first of cave life. 
Here are clusters of bats which sleep in the daytime, hanging by their 
