80 University of California Publications in Zoology [Vol. 27 
chronology of Eschscholtz’ travels as indicated in Kotzebue’s narra- 
tive (1830, vol. 2), we have Eschscholtz ’ statement that his specimen 
was collected in November : “Lebt in Calif ornien, wo das hier be- 
schriebene Exemplar in November an einer Quelle gefunden wurde” 
(Eschscholtz, 1833, pt. 5, p. 6). Either the latter is a lapsus calami 
for October, or else Eschscholtz made other trips within the range of 
the species which are not mentioned by Kotzebue. The expedition 
sailed from San Francisco on November 25, 1824. 
This species was subsequently described as “ Ambly stoma tene- 
brosum” by Baird and Girard (18525) on the basis of a specimen 
collected by the U. S. Exploring Expedition in “Oregon,” even 
though Baird as early as 1849 was aware of Eschscholtz’ species. 
Girard (1858) included tenebrosum in the genus Xiphonura. Strauch 
(1870) founded the genus Dicamptodon for Eschscholtz’ species, while 
Cope (1887a;) established the genus Chondrotus for a group of Amby- 
stomids of which tenebrosus was made the type species. Cope in his 
monograph on the Batraehia (1889) treated “Dicamptodon ensatus” 
and “ Ambly stoma tenebrosum” separately. Van Denburgh (1916) 
suggested that these two names pertained to the same species, and 
Dunn (1920; 1922a) confirmed this suggestion on the basis of 
anatomical studies. 
The description provided by Rathke (in Eschscholtz, 1833) is to 
date the only extensive account of the internal anatomy of the species, 
Cope’s account in 1889 being essentially a description of the external 
features. No account of the life-history has appeared heretofore. 
Range. — At the north, Dicamptodon ensatus has been recorded at 
Sumas Lake (Boulenger, 18825, p. 49) and at “Chilowyuck Lake, 
Oregon” [^Chilliwack Lake, British Columbia] (Cope, 1889, p. 
112). This locality is about five miles north of the Washington-British 
Columbia boundary. The species is not mentioned in any of the lists 
of amphibians of British Columbia which are at hand. In Washing- 
ton it occurs on Puget Sound, and in Oregon at Portland and Astoria 
(Cope, loc. cit.). The California Academy of Sciences has a specimen 
from Tillamook, Tillamook County, Oregon. In California, Dicamp- 
todon ensatus has been found coastwise from Requa, Del Norte County 
(Calif. Acad. Sci.) south to Felton, Santa Cruz County (Fowler and 
Dunn, 1917, p. 11). At the north it ranges inland as far as Baird, 
Shasta County (Townsend, 1887, p. 240), but proceeding southward 
its eastward limit comes nearer and nearer the coast, as indicated by 
the following limiting records: Allen Springs, Lake County (Grinnell 
