EXPLANATION OP PLATES 
Note. — The illustrations beyond are from negatives prepared by the author 
with these exceptions: Mr. C. L. Camp made that for fig. 22; Mr. Wright M. 
Pierce supplied the print for fig. 4; Mr. W. C. Matthews (under the author’s 
direction) made the negatives for figures 19, 23, 25, 26, 28, 29, 36-39, 50, 52. 
Mr. Matthews also prepared all of the prints from which the half-tone blocks were 
made. 
Where the figure legend is followed by a number the negative is in the photo- 
graphic file of the Museum of Vertebrate Zoology; the remaining negatives are 
in the author’s private collection except those for figures 1 and 18, which are in 
the file of the Zoological Laboratory, College of Agriculture. 
PLATE 1 
Pig. 1. Temporary pool in foothills, 2 miles west of Wallace, in San Joaquin 
County, photographed February 15, 1924. Spawning place of Amby stoma eali- 
forniense. 
Fig. 2. Portion of Costen Lake, 10 miles northwest of Ukiah, Mendocino 
County, photographed June 18, 1922. Spawning place of Dicamptodon ensatus. 
Used also by Triturus torosus. 
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