1925] Storer: A Synopsis of the Amphibia of California 
115 
greatest width of head more than that of body; neck constriction 
slight; lower jaw broadly oval in outline; gular fold at middle of 
neck ; limbs moderate ; upper arm slender ; forearm stouter and shorter 
than upper arm; palm rounded, without tubercles; digits short, sub- 
equal, third longest, first shortest, tips slightly expanded ; inter digital 
webs extend about half length of digits; body depressed, not appre- 
ciably enlarged at middle ; costal folds 12, not clearly indicated ; hind 
limb resembling fore limb, but slightly longer; exposed portion of 
femur slightly longer than tibia; sole of foot broader than long, 
smooth; toes subequal, inner one smallest, tips slightly dilated; webs 
about half length of toes; tail about one-third total length, cylindric 
at base, tapering evenly to tip. Surfaces everywhere smooth. 
Fig. NN. Hydromantes platycephala, X 2% (after Camp, 1916&, figs. 1-5). 
1. Top of head, £ (no. 5693, M. V. Z.). Note breadth of head and width 
of interorbital space. 
2. Side of head, $ (no. 5693, M. V. Z.). Note small external naris, thin 
form of head, relative size of eye. 
3. Opened mouth, (no. 5694, M. V. Z.). Note long maxillary teeth, double 
arc of vomerine teeth, divergence of parasphenoid teeth and pediceled 
tongue. 
4. Left forefoot, (no. 5694, M. V. Z.). 
5. Left hind foot, <$ (no. 5694, M. V. Z.). 
Note extent of webbing, and short blunt form of toes. 
Tongue small and thin, less than half width of head, oval in out- 
line, free all around and pedunculate, freely protrusible; maxillary 
teeth short and numerous and confined to anterior portion of jaw in 
female, longer, less numerous, protruding below closed lips, and con- 
tinued to angle of jaw in male; vomerine teeth entirely posterior to 
internal nares, in two arcs joined medially and extending laterally 
beyond internal nares; parasphenoid teeth in two elongate patches 
slightly separated anteriorly, divergent posteriorly. 
‘ ‘ Color in life dark chocolate, marked evenly and thickly on back 
and sides of head and body, on limbs, feet and tail, and below chin, 
with lichen-like gray markings, yellowish in tinge down middle of 
back, where less distinct, and bluish on sides ; underparts posterior to 
gular fold uniform dark chocolate. Iris bright yellow. In alcohol 
the yellowish tints have disappeared” (Camp, 19165, p. 13). 
