Alligator Lizards 37 
process. Gerrhonotus coeruleus is viviparous while multi- 
carinatus is ovoviviparous and deposits eggs which require sev 
eral weeks to hatch. Viviparity in coeruleus may be correlated 
with its colder and damper habitat. 
Several months of each year are passed in hibernation by 
the alligator lizards of some localities, whereas in other localities 
hibernation is incomplete ; individuals may be active on warm 
days, even during the winter. 
These lizards are solitary in habits and show almost no 
trace of social behavior, Fighting is unusual among them but 
may occur between individuals competing for the same morsel 
of food (as observed with those kept in captivity), or between 
breeding males competing for the same female. 
Captive individuals showed indications of learning, and 
formed habits rapidly. Gerrhonotus probably ranks high among 
reptiles in intelligence. 
BIPLIOG RAT FY 
Atsatt, S. R. 1913. The reptiles of the San Jacinto region of California. 
Univ. Calif. Publ. Zool., 12: 31-50. 
Compton, L. V. 1933. A garter snake attemping to eat an alligator 
lizard. Copeia, 1933: 225. 
Fitcu, H. S. 
1934a. New alligator lizards from the Pacific Coast. Copeia, 1934: 6-7. 
1934b. A shift of specific names in the genus Gerrhonotus. Copeia, 
1934: 172-173. 
Gavow, H. 1913. The wanderings of animals (Cambridge Univ. Press), 
vit+150 pp., 17 maps. 
GaNber, F. 1931. Observations on an alligator lizard. Copeia, 
1931: 14-15, 
GRINNELL, J. 1908. The biota of the San Bernardino Mountains. Univ. 
Calif. Publ. Zool., 5: 1-170, 24 pls. 
GRINNELL, J., and Grinnett, H. W. 1907. Reptiles of Los Angeles County 
California. Throop Inst. Bull., 35: 1-64, 23 figs. in text. 
