102 University of California Publications in Zoology [Vol. 27 
than adults; lower surface often minutely dotted with brown. [De- 
scription based on four small individuals from San Miguel Island, 
compared with redescription of species by Van Denburgh, 1905, p. 8.] 
Remarks on coloration. — Van Denburgh and Slevin (1914, p. 134) 
say that one of two specimens collected on San Miguel Island had a 
reddish dorsal band similar to that seen in some specimens of B. atten- 
uatus. The other showed the uniform yellowish brown coloration 
characteristic of all other known specimens of B. pacificus. 
Measurements of Specimens of Batraclioseps pacificus from San Miguel Island 
off Coast of Southern California 
(Adapted from Van Denburgh, 1905, p. 8.) 
Total 
length 
Length of 
tail* 
Snout to 
gular fold 
Greatest 
width of 
head 
Fore leg 
“Between 
limbs” 
(axilla to 
groin?) 
Hind leg 
45 
20 
6 
3.5 
5 
15 
5.5 
67 
31 
7.5 
5 
7 
22 
7.5 
113 
64 
10 
7 
9 
31 
9.5 
108 
56 
10 
6.5 
9 
36 
9.5 
115 
63 
10 
7 
8.5 
33 
8.5 
- 115 
59 
10.5 
8 
9 
38 
10 
* Apparently measured from anterior border of anal opening and not posterior 
border as elsewhere in present paper. 
History. — -Cope described this salamander in 1865 on the basis of 
a specimen listed as from Santa Barbara, but which in all probability 
was secured on one of the islands where the species is now known to 
occur (see Van Denburgh, 1905, pp. 5-6). 
Range . — This species is restricted to Santa Kosa, San Miguel, and 
Santa Cruz islands in the channel group off Santa Barbara County 
(Van Denburgh, 1905, pp. 5-6; Van Denburgh and Slevin, 1914, 
pp. 134, 135). Cope’s ascription of this species to San Francisco was, 
as pointed out by Van Denburgh, undoubtedly due to misidentifica- 
tion of specimens of attenuatus. 
Life-history. — This species is evidently similar in habits to its 
mainland relatives. On San Miguel Island it has been found on the 
ground under a fallen post, and on Santa Cruz Island five were taken 
under old bark and rotten logs (Van Denburgh and Slevin, loc. cit.). 
This island Batraclioseps is said by Van Denburgh to bear a 
resemblance to species of Plethodon, and in one instance this resem- 
blance is carried farther by the presence of five toes on the hind foot 
