1925] 
St over: A Synopsis of the Amphibia of California 
237 
To illustrate the nature of the habitat of this species the following 
exact places of occurrence which have come to the attention of the 
writer may be mentioned. (1) Pool at base of small waterfall in 
Eaton Canon northeast of Pasadena; (2) small permanent reservoirs 
in shade of trees on orange ranches near Sierra Madre; (3) pools on 
course of creek in the Arroyo Seco between Los Angeles and Pasa- 
dena; (4) permanent artificial reservoir in hills southeast of Berkeley ; 
(5) pools on fresh-water marshes west of Point Reyes Station, Marin 
County; (6) quiet water of slough adjacent to Merced River at 
Snelling. 
Adults of draytonii may sometimes be seen out in the daytime, as 
in the pools on the marshes of Olema Creek, mentioned above. The 
animals there rested on the mat of aquatic vegetation which covered 
the surface of the water, ordinarily w 7 ith only their heads above the 
surface. At the first hint of danger, such as the approach of a person, 
they dove, one by one, into the depths of the pools and remained below 
for many minutes. 
The habits of draytonii during the winter months vary according 
to locality. In the vicinity of Berkeley individuals have been seen 
out as late as November 20, and spawning has occurred as early as 
February 6. The finding of fresh eggs at ^Los Angeles as early as 
January 9 (1924) argues for but a brief season of inactivity during 
the winter season in that locality. Camp (MS) states that but few 
of these frogs can be found during the winter months at Sierra Madre 
(altitude 1200 feet) ; he once found several buried deep in wet leaves 
in December. However, January 9, 1910, is a date of record for eggs 
at Sierra Madre (Camp, MS). At Sampson Flats, 7 miles north of 
Dunlap, Fresno County (altitude about 2000 feet), on January 13, 
1924, Mr. Joseph Dixon (MS) found seven individuals of draytonii 
which were evidently wintering in a layer of silt in the bottom of a 
boxed-in spring, the water being about 12 inches deep and the silt 
6 inches. The frogs were entirely hidden from view and were torpid 
when taken out. The ground adjacent to the spring remained frozen 
through the day and there were patches of snow nearby. 
In general, the ponds and creek pools which are the haunts of this 
species are seldom frozen, and if they do freeze, the ice seldom lasts 
for more than part of one day. In the lowland range of the species 
the percentage of nights with freezing temperatures is very small. 
At the moderate altitudes occupied by the species along the western 
flank of the Sierra Nevada and along the southern flank of the Sierra 
