1925] Storer: A Synopsis of the Amphibia of California 85 
River near Baird, Shasta County. ‘‘They swam with great rapidity, 
darting about and hiding themselves among the fallen leaves that 
covered the bottom. . . . They are common in the mountain streams 
of northern California and western Oregon” (Cope, loc. tit.)- 
The only definite information available as to time of hatching is 
that afforded by the material sent from Costen Lake in 1923 in which 
some of the larvae hatched one or more days prior to April 28, as 
evidenced by the empty capsules collected on that date. The last of 
these would probably have been out by May 1 or shortly thereafter. 
On May 6, 1923, the writer collected three small larvae of this species 
in some quiet water on the Olema Creek marshes near Point Reyes 
Station, Marin County. These were probably hatched about a week 
earlier. A specimen collected in a roadside pool near Lagunitas, 
Marin County, on March 9, 1913, is 51 millimeters in total length. 
Two others taken at Lagunitas, April 21, 1918, measure 61 and 64 
millimeters, respectively. These, if of the broods of their respective 
years, would indicate extremely early dates for egg deposition. On 
the other hand, they may have been small individuals of the brood 
of the preceding year, which wintered over in the sizes indicated. 
Exact information concerning the rate of development of the larvae 
is not available; but something of value in this connection may be 
learned by a consideration of the material which has been collected 
at various localities in the Coast Ranges of northwestern California 
during the past fourteen years. The following table lists all the 
material to which the writer has access at the present time. 
Larval Specimens of Dicamptodon ensatus 
M. V. Z. 
No. 
Locality (in California) 
Date of capture 
Total length 
in millimeters 
4812 
Lagunitas, Marin Co 
Mar. 9, 1913 
51 
6734 
Lagunitas, Marin Co 
Apr. 21, 1918 
61 
6735 
Lagunitas, Marin Co 
Apr. 21, 1918 
64 
Costen Lake, Mendocino Co 
Apr. 28-May 1, 1923 
15-17 1 
— 
Marsh west of Pt. Reyes Station, 
Marin Co. .. 
May 6, 1923 
18 
8568 
Costen Lake, Mendocino Co 
June 18, 1922 
49 
4965 
7 mi. w. Cazadero, Sonoma Co 
June 23, 1913 
46 
4925 
Gualala, Sonoma Co 
July 6, 1913 
86 
4927 
Mendocino City, Mendocino Co. 
July 13, 1913 
77 
4928 
Mendocino City, Mendocino Co. 
July 13, 1913 
80 
9146 
Carlotta, Humboldt Co 
July 27, 1923 
82 
2342 
Fair Oaks, Humboldt Co 
Aug. 24, 1910 
207 
2343 
Fair Oaks, Humboldt Co 
Aug. 24, 1910 
228 
6342 
Muir Canon, Marin Co 
Sept. 30, 1917 
54 to 142 2 
1 Just hatching. 2 40 specimens. 
