NOTES ON THE LIFE-HISTORY OF CHOROPHILUS 
TRISERIATUS. 
r\^ the 22d day of last March, while searching the ponds about 
^^ Irvington, Indiana, for Amblystomas and their eggs, I 
discovered some amphibian spawn whose parentage I did not 
then recognize; but which, after hatching, development, and 
metamorphosis, proved to be that of the little frog, Chorophilus 
triseriatus. 
The eggs were deposited in an admirable situation for making 
observations upon them. A large tree, standing at the edge of a 
shallow temporary pond, had been overthrown ; and when the 
roots had been buried, a hole some two feet deep had been left, 
and this was full of water. It was so cut off from the pond that 
by arranging a few sticks and leaves it was made very difficult 
both for the tadpoles coming from these eggs to leave the pool 
and for those of the other species to enter it. There were 
large numbers of the eggs, hundreds of them ; but whether or 
not all had been deposited by a single female, I could not tell. 
The species is here apparently rare, but a single specimen having 
been captured. Many such animals, however, have a faculty for 
concealing themselves for years ; until some lucky accident, or 
an unusually close search, reveals to us their real abundance. 
The eggs were deposited in bunches of various sizes and were 
attached to branches and twigs which had fallen into the water. 
They clung to one another and to the twigs by means of the 
clear jelly that surrounded each egg. They had already gone 
well forward in their development, since each contained a larva of 
the form shown in Figure i . It will be seen that the dorsa 
flexure is very pronounced, and the tail is thrown over the back. 
The diameter of each egg is about 3 mm. 
Figure 2 represents the larva as it appears on the 28th day of 
March. It is now 5 mm. long, and has lost its dorsal flexure, but 
is coiled laterally within the egg membranes. Sections show the 
