78 Trans. Acad. Sci. of St. Louis. 
and on the sides of the pools. The larger ones are un- 
usually wary and it is a‘ difficult matter to capture them 
even with a dip net. I was unsuccessful in an attempt 
to transfer several of them to the aquarium in our lab- 
oratory, for although all precautions were taken, they 
died a short time after their capture. The tadpoles were 
found in three lots and were of three different sizes. 
Those of lot 1 (three in number) were in a rather deep 
and well shaded water pocket, under an overhanging 
rock. Dimensions of pocket, 6x4 feet. Depth at deepest 
point, about a foot. When first observed the tadpoles 
were in the shallow portion, but on being alarmed swam 
to the bottom. All three appeared to be of about the 
same size. 
In lot 2 were ten specimens, each about two-thirds the 
size of those in the first lot. In a water pocket six inches 
in depth. 
Lot 3, twenty or more specimens, the majority of which 
were small (stage 1), were in water in a section of the 
gulch where tiny springs issue from the bases of the 
bluffs. The water was barely running and the portion 
of the stream in which the tadpoles were found was about 
25 feet in length and from 6 to 24 inches in width, with 
a depth of only a few inches. Rocky bottom, well covered 
with dead leaves. 
Judging from these exhibits the number of eggs de- 
posited by this species must be remarkably small, for 
those of the smaller Anurans such as Chorophilus triseri- 
atus and Acris gryllus usually number 500 or more. As 
no fish were found in the pools and none of the Ophidians 
were as yet active, the question of the number being re- 
duced by animal foes is entirely eliminated. The eggs or 
tadpoles could not have been scattered by being washed 
down stream as there were no accumulations of water 
higher up in the bed of the gully. By the 19th of March 
the larger tadpoles had become fully developed frogs and 
left the water with their short tails still in evidence. 
They were slightly over a third as large as full grown 
