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University of California Publications in Zoology [Vol. 27 
fronted ; external nares on sides of snout below canthus rostralis ; eyes 
prominent, bulging high above plane of head; interorbital width 
slightly greater than length of orbit ; parietal region slightly rounded 
backward to beginning of mid-dorsal groove of back; side of head 
below eye slanting slightly outward, meeting lower jaw in a smooth 
curve ; a deep groove from behind eye to beyond commissure of jaw, 
then more faintly to lateral extension of gular fold; between this 
groove and margin of upper jaw a swollen fold of skin from eye to 
commissure ; an imperfect fold of skin indicated on chin between 
angles of lower jaw ; gular fold deep ; neck constriction moderate ; 
upper arm shorter than forearm ; palm smooth ; digits 4, blunt-ended, 
in order of decreasing length, 3, 2, 1, 4 ; body wider than high, slightly 
swollen at midlength ; costal folds 12, the grooves faint and a second- 
ary groove between each two major ones ; a shallow mid-dorsal groove 
from slightly in front of axillae to beginning of tail ; hind limb some- 
what stouter than fore limb, digits 5, in order of decreasing length, 
4, 3, 2, 5, 1 ; sole entirely smooth, without tubercles of any sort ; body 
subquadrate at anal region, beyond which the tail assumes a com- 
pressed form to its end, with slight suggestion of fleshy fin above ; 
lateral surface of tail exhibits a number of vertical grooves; ventral 
surface of tail flat. 
Tongue broad, practically filling lower jaw ; vomerine teeth entirely 
behind internal nares, in two slightly convex transverse rows, bulging 
forward slightly at center where divided ; maxillary teeth numerous 
and conspicuous. 
Entire surface of body soft and smooth, abundantly supplied with 
closely spaced mucous pores evident to unaided eye ; in addition, a 
finer series of pores may be seen at magnification of 17 to. 20 times. 
Ground color, Hay’s brown on head, near deep brownish drab on 
body and tail; a ‘marbled’ or reticulated pattern of blackish markings 
over ground color everywhere on dorsal surface, and about halfway 
down sides of body and two-thirds distance down sides of tail, this 
pattern also appearing on exposed surfaces of limbs; ventral surface 
without pattern ; ground color light cinnamon drab with irregular 
patches near ivory yellow ; vicinity of gular fold pearl gray ; soles 
of feet pinkish ; midventral surface of tail light colored like belly ; 
iris deep brown; pupil bluish black (colors from living specimen com- 
pared with Ridgway [1912]). 
Description of larva (based on forty alcoholic specimens under 
no. 6342, Mus. Vert. Zool.). — Muzzle truncate, trapezoidal as viewed 
from above ; forehead in profile sloping evenly to end of snout which 
is quite thin ; canthus rostralis slightly indicated ; orbit situated more 
than its diameter from end of snout; interorbital width slightly less 
than diameter of orbit ; greatest width of head slightly more than that 
of middle of body ; a slight mid-dorsal groove ; costal furrows faint ; 
limbs and digits proportionately about as in adult; dorsal tail fin 
extends forward to opposite anterior border of anus ; ventral fin stops 
slightly anterior to midpoint in length of tail (in the older larvae at 
hand from Fair Oaks [nos. 2342, 2343] the dorsal fin ends midway 
of the tail). 
