248 
University of California Publications in Zoology [Vol. 27 
surface of tail mottled with 2 mm. spots of blackish; chin white, 
slightly clouded; under surface of body between legs, white; under 
surfaces of legs dirty white. 
Measurements of Adult Specimens of Rana boylii boylii from California 
M.V.Z. 
No. 
Sex 
Locality 
Date 
Head-and-body 
length 
Length of head 1 1 
Width of head j j 
IS 
o 
Interorbital 
space j 
Forearm 
Hand j 
S3 
g 
£ 
Tibia 
Tarsus 
Whole foot J J 
6110i 
9 
Fyffe, Eldorado Co., 3600 
ft. 
July 31, 1916 
48.8 
16.0 
18.5 
5.7 
5.5 
11.0 
12.2 
28.5 
14.3 
38.0 
5961 
9 
Sweetwater Creek, Mari- 
posa Co., 3800 ft 
Nov. 1, 1915 
54.0 
17.2 
21.2 
6.8 
4.0 
13.0 
15.0 
29.5 
32.5 
15.5 
46.0 
6109i 
9 
Fyffe, Eldorado Co., 3600 
ft 
July 31, 1916 
57.0 
18.2 
22.5 
6.4 
3.8 
13.0 
16.0 
31.7 
33.0 
16.0 
47.0 
5686 
9 
3 mi. ne. Coulter ville, 
Mariposa Co., 3200 ft 
June 3, 1915 
62.7 
19.2 
23.3 
7.0 
5.2 
16.0 
14.3 
30.3 
34.7 
17.8 
47.0 
6339 
9 
Muir Woods, Marin Co 
Sept. 30, 1917 
66.0 
20.6 
26.5 
8.0 
4.6 
15.8 
16.8 
35.0 
37.3 
18.0 
51.0 
2410 
cf 
Muir Woods, Marin Co 
Sept. 9, 1910 
39.0 
14.0 
15.0 
5.4 
4.4 
10.0 
11.1 
21.2 
21.8 
11.2 
31.0 
2409 
cf 
Muir Woods, Marin Co 
Mar. 5, 1910 
45 5 
14.7 
18.1 
5.7 
3.3 
11.1 
12.7 
24.0 
25.4 
12.6 
36.0 
5080 
cf 
3 mi. s. Covelo, Mendo- 
cino Co 
July 23, 1913 
48.7 
16.5 
20.4 
5.6 
3.0 
10.8 
13.6 
27.5 
27.8 
14.0 
40.0 
8514 
c f 
Frank Valley, Marin Co. .. 
May 1, 1922 
51.0 
14.7 
17.2 
6.6 
13.8 
12.2 
26.4 
29.0 
14.0 
41.0 
4084 
cf 
w. side Mt. Diablo, Con- 
tra Costa Co., 2750 ft 
July 22, 1912 
54.0 
15.7 
20.1 
7.0 
4.0 
13.3 
13.7 
30.7 
28.8 
14.0 
42.5 
1 Near topotypes. 
History. — Rana boylii was originally described by Baird in 1854 
from “ California, ” on the basis (Cope, 1889, p. 447) of two speci- 
mens obtained in Eldorado County by Dr. C. C. Boyle. In earlier 
years this frog was confused with a northern form, pretiosa, and 
Boulenger (1892), probably on the basis of inadequate material, con- 
fused boylii with draytonii. Cope in 1883 described material from 
the McCloud River as Rana pachy derma. Stejneger in 1893 (pp. 
225-227) pointed out the confusion which had existed then for many 
years concerning the western frogs; but it was not until 1917 that 
Camp, using the extensive series collected by the Museum of Verte- 
brate Zoology, and with adequate knowledge of the differing habitats 
of the several species, indicated the proper relationships of the west- 
ern forms and described the three well-marked varieties of boylii. 
Range. — The boylii group of frogs is restricted to California and 
southern Oregon. Individuals of this species have been found in 
Douglas County, Oregon, at Drain (specimens in Calif. Acad. Sci.) 
and at Roseburg (Van Denburgh, 19125, p. 159). Cope (1889, p. 447) 
mentions specimens from Ashland, Jackson County. The subspecific 
status of these is undetermined, but presumably they all belong to 
