1925] Storer: A Synopsis of the Amphibia of California 75 
toes slender, tapered, slightly depressed, in order of decreasing length 
3, 4, 2, 1, 5 ; cloaeal region slightly swollen ; tail compressed oval at 
base, one-third higher than wide, flattened to thin compressed fin 
at tip. 
Tongue thin and narrow, about one-third (half) width of mouth 
at angle of jaws, attached almost completely to floor of mouth ; in- 
ternal nares pyriform in shape, well separated and close to sides of 
upper jaw; vomerine teeth in 4 linear groups in slightly undulating 
line across entire roof of mouth, slightly posterior to internal nares ; 
maxillary teeth small and numerous. 
Surfaces of body rugose with many conspicuous deep pits in skin 
everywhere on dorsal and lateral surfaces of body and tail; tip of 
snout, interorbital region, limbs, and feet, and ventral surface of body 
and tail, smooth ; parotoid gland with numerous blunt papillae. 
Color (in alcohol) on dorsal and upper lateral surfaces, dark choco- 
late brown ; ventrally, dingy yellowish brown. 
Measurements (no. 29108, Calif. Acad. Sci.). — Total length 179 
millimeters ; length of tail 83 ; snout to gular fold 23.6 ; greatest width 
of head 19.5 ; orbit 6.6 ; interorbital space 6.6 ; elbow to tip of longest 
finger 23.8 ; axilla to groin 39 ; knee to tip of longest toe 27.8 ; hind 
foot 16.4. 
Description of larva (based on specimens from Fair Oaks, Humboldt 
County). — General form stout; head elongate, length to behind gills 
about I 1 /*} times greatest width ; tip of muzzle truncate in outline from 
above; head thick in profile, forehead sloping, muzzle rounded at tip; 
external nares small, lateral, nearly terminal, below canthus rostralis ; 
anteorbital region about 1% times length of orbit; inter orbital width 
greater than length of orbit ; body deeper than wide, its greatest width 
about two-thirds that of head ; costal folds 10, furrows well developed ; 
limbs and especially digits slender ; dorsal fin commencing at posterior 
margin of head, height moderate, less than that of muscular part of 
tail at anus ; ventral fin beginning immediately posterior to anus ; gills 
short, about equaling length of commissure of mouth ; vomerine teeth 
in fl -shaped pattern, parallel to margin of upper jaw, and scarcely 
interrupted at midline. 
General coloration (in alcohol) above reddish brown, paling grad- 
ually on lower sides to white of under surface; darker portions of 
body and tail with numerous spots (1 mm.) of white ; exposed surfaces 
of limbs dusky, concealed surfaces white. 
History. — Stejneger and Barbour (1923, p. 6) cite Dunn as sug- 
gesting that the type of Siredon gracilis Baird represents the larva 
of this species, in which case the name gracilis would supplant 
paroticum. With only the figure (Baird, 1859, p. 13, pi. 44. [figs. 
2 a-e] ) available I am unable to agree to this disposition. Paroticum 
as represented by larval material from California and Washington 
has parotoid glands developed in the older larvae (one of which is 
evidently figured by Baird), an unique character which would scarcely 
