72 University of California Publications in Zoology [Vol. 27 
ensatus by smaller size, 10 instead of 12 costal folds, striped instead of 
marbled pattern of coloration, slenderer digits, and arrangement of 
vomerine teeth in 4 instead of 2 groups. 
Description (based on 3 specimens from Crater Lake, Oregon).— 
General form moderate among California salamanders, tail short, 
digits elongate ; head decidedly longer than wide ; muzzle oval in out- 
line from above, thin and smoothly rounded at tip in profile ; external 
nares small, laterally placed below canthus rostralis ; canthus rostralis 
distinct though rounded, its length exceeding that of orbit ; orbit 
small; interorbital space slightly convex, about equaling length of 
orbit; lower jaw evenly rounded; chin and throat flat; neck con- 
striction slight; gular fold distinct, extending up side of neck; fore 
limb slender ; free portion of upper arm slightly longer than forearm ; 
palm practically smooth; digits all slender, decidedly longer than 
palm, in order of decreasing length 3, 2, 4, 1, inner one well developed ; 
body cylindrical, slightly enlarged at midlength; costal folds 11, not 
conspicuous; hind limb slightly stouter than fore limb; tibia shorter 
than free portion of femur; toes long and slender, exceeding length 
of sole, in order of decreasing length 4, 3, 2, 5, 1 ; anal region slightly 
swollen; tail compressed, oval in section at base, thin and fin-like 
at tip. 
Tongue broad, thin, roundedly diamond-shaped in outline, nearly 
filling floor of mouth and free only at extreme edges; internal nares 
round, placed well back from tip of muzzle and near to margin of 
jaw; vomerine teeth in four groups, central pair largest and joined 
in broadly A -shaped pattern between internal nares, two lateral 
groups smaller and entirely behind internal nares. 
Surfaces of body everywhere smooth ; a few enlarged mucous pores 
surrounding orbit, on interorbital space, and on upper lip. 
General color (in alcohol) of upper and lateral surfaces of body 
and tail and exposed surfaces of limbs, dark chocolate brown ; broad 
irregular-margined stripe along mid-dorsal region from neck to end 
of tail, lead gray; ventral surface dull yellowish brown; lower half 
of body and limbs everywhere, with many fine dots of whitish. 
Patch (1922, pp. 75-76) records the coloration of a specimen 4.55 
inches (115 millimeters) in length taken at Watson Lake, 45 miles 
north of Clinton, British Columbia, September 28, 1918, as follows : 
Ground color very dark chocolate brown on sides, slightly lighter on feet, 
throat, chest and lower surface of tail. Dorsal surface, from muzzle to end of 
tail, greenish-yellow. This yellow and the brown ground color are about equally 
present on the muzzle in a spotted arrangement. Entire upper surface of head is 
yellow, spotted with nine angular areas of brown. The yellow narrows on the 
shoulders and pelvis, but on the back and tail it has the appearance of paint which 
has been poured along the vertebral line and allowed to run downward entirely 
surrounding parts of the ground color, thus forming angular spots, and nearly sur- 
rounding others which extend upward into the yellow. There are a few angular 
yellow spots on the sides. The yellow^ is crossed by the ground color at two places 
near the end of the tail. The upper surfaces of the legs and feet are spotted with 
yellow. The feet, the lower sides, and all under surfaces excepting that of the 
tail are profusely specked with white. The under surface of the tail is slightly 
specked with white. Other specimens show variation by having elongated areas of 
the ground color present along the vertebral line. 
