PROCEEDINGS 
OF THE 
CALIFORNIA ACADEMY OF SCIENCES 
FourTH SERIES 
Vot. III, pp. 391-454, pls. 17-28 NovEMBER 5, 1913 
A LIST OF THE AMPHIBIANS AND REPTILES OF 
ARIZONA, WITH NOTES ON THE SPECIES IN 
THE COLLECTION OF THE ACADEMY 
BY 
JOHN VAN DENBURGH 
Curator of the Department of Herpetology 
AND 
JOSEPH R. SLEVIN 
Assistant Curator of the Department of Herpetology 
Early in March, 1912, the authors of this paper arrived in 
Yuma and began the gathering of a representative collection 
of Arizonan reptiles and amphibians. March and the first week 
of April were spent there and in the vicinity of Tucson, where 
large collections were secured. The senior author then re- 
turned to San Francisco, leaving Mr. Slevin to continue the 
work in various parts of Arizona throughout the summer. 
Mr. John I. Carlson, in 1910, had made considerable collec- 
tions in Yuma and Maricopa counties under my direction. 
Our thanks are particularly due to the late Mr. Herbert Brown 
of Tucson, who is well known as a student of the natural his- 
tory of Arizona, for his kind aid, gifts of specimens, and ad- 
vice as to favorable collecting grounds. Professor Brown, of 
the University of Arizona, and Mr. Bancroft very kindly gave 
us a number of specimens. The authorities of the Carnegie 
Desert Laboratory at Tucson also were most generous in their 
assistance, with gifts of specimens and the loan of camping 
equipment which made possible the trip to the summit of Mt. 
Lemon. 
The Arizonan collections at hand number about three thou- 
sand specimens, and include a large majority of the species 
known from the state. Some species have been credited to 
November 3, 1913 
ene. 
