1925] 
Storer: A Synopsis of the Amphibia of California 
209 
hence, by reason of the fact that only two hylids occur in the region, 
they w’ere believed to be those of Hyla arenicolor. At the same time 
one solitary egg in a spherical capsule was collected. Nothing was 
then known of the nature of the eggs of arenicolor , and the solitary 
egg was considered to have been deposited separately by accident, as 
sometimes is done by H. regilla. But subsequent findings showed that 
this egg was deposited in a thoroughly characteristic manner. Miss 
Atsatt continued to search the creeks for eggs of Hyla arenicolor and 
on April 15, 1923, she found eggs of this species spawned under 
natural conditions in Snow Creek, on the south side of San Gorgonio 
Pass, in Riverside County. Some of these, together with other eggs 
spawned in captivity, and with some of the adult animals, were for- 
warded to the writer at Berkeley for study. The field notes incorpo- 
rated herein, were, except where otherwise indicated, furnished by 
Miss Atsatt. 
An examination of Snow Creek on April 14 to 16, 1923, indicated 
that the breeding season of Ilyla arenicolor was at its height. Adult 
specimens of this species together with some small individuals of Rana 
hoylii muscosa were found in a series of pools adjacent to the main 
creek. Some of the hylas were collected and placed together in a 
can on the night of April 14-15, and the next morning a mass of eggs 
was found with the hylas. This prompted search of the pools for 
naturally spawned eggs which were soon discovered. The first eggs 
to be found were attached to the upper surface of some sycamore 
leaves which had fallen the previous autumn and lay unrotted, in the 
bottom of a pool (pi. 13, fig. 39). Then other eggs were found floating 
near the surface of the water, and still others on the bottom of the 
pool. A few were found attached to the undersurfaces of leaves in 
the pond. 
The eggs are extruded singly [like those of the Eastern Peeper, 
Hyla pickeringi], and the jelly coat is very sticky so that when an 
egg touches any object it at once becomes affixed. Either the spawn- 
ing animal moves about a good deal while the eggs are being laid, or, 
if she remains in one position, the eggs are extruded singly and dis- 
persed by the current of the stream. That some sort of scattering 
of the eggs is operative was indicated by the finding of about twenty 
fresh eggs distributed over an area about two feet square. When the 
eggs are laid in the confines of a small container, even though extruded 
singly they adhere together in a way which was not found to occur 
under natural conditions. The sticky condition of the jelly continues 
