28 Transactions of the Academy of Science of St. Louis 
10:10 a. m. a young one (thus the fourth of the brood) was 
suddenly ejected. It was enclosed in a membranous sac and 
coiled with the legs extending backwards along the sides and 
the head and tail folded on the body. A piece of egg yolk about 
4 mm. in diameter was enclosed with it. At 10:12% a. m. the 
young made a slight movement. The female paid no attention 
to it but became active and crawled to a corner of the box. 
Here she again elevated her hind legs and after a a move- 
ments of her sides ejected another young, at 10:23 a. 
The first young one was still lying coiled and motionless. 
At 10:27 a. m. the second young one made feeble movements 
which gradually became more pronounced, and at 10:53 a. m. 
it tore itself free from the enclosing membrane and ran clumsily 
across the end of the box. In running, its movements were 
stiff and jerky, — those of a salamander. At 11 a. m. 
the female touched it with her tongue as she passed. Thus 
stimulated, it ran to sporket corner of the box. A few moments 
later the female again came face to face with it as she moved 
about the box. This young lizard was now fully active and, 
as the female approached, it gave a characteristic fear reaction 
(backing away and nervously thrashing the tail), then turned 
and darted away to the far end of the box. The first young 
one did not make vigorous attempts to escape from the memr 
brane enclosing it until about an hour after the time of par- 
turition. It then experienced difficulty, since the membrane had 
dried and adhered to it. An hour and a half had passed before 
it became on active and could open its eyes and protrude its 
tongue. At 11:55 another young one was born. The female 
gave birth e i seventh and last of the ed at 1250 pj. im. 
The young were active and restless. They apparently aie 
went a partial molt immediately after birth, as they were seen 
to rub off small patches of skin. 
Young kept in captivity fed poorly and showed no percep- 
tible growth even when they were kept for several months. 
Throughout its range, shastensis has a dark and a light ex- 
treme of coloration often existing side by side (pl. 1, fig. 2). 
This difference apparently is not correlated with sex. The dark 
extreme is the more common and the majority of individuals 
are more or less intermediate. In series from almost any 
locality individuals may be picked showing differences which 
might well be of specific value, were they constant in geograph- 
ically separated races, 
The optimum habitat conditions seem to be in a borderline 
environment, hence one that is shifting and transitory locally. 
Assuming that the color pattern is not purely incidental but is 
