18 University of California Publications in Zoology (Vou. 9 
especial fitness of the soil and climate. Of nineteen recognized 
species and subspecies, all but eight are found in the United 
States, these eight being distinctly Mexican species. The Texas 
horned lizard, Phrynosoma cornutwm, is perhaps the best known 
and most widely distributed of any of the species, being found 
from southern Kansas and Colorado to the Gulf of Mexico and 
into Mexico as far as Monterey, and from New Mexico to Arizona. 
Other species, as for instance P. modestum, have a more limited 
distribution. 
In California and Nevada are found four representatives of 
the genus Phrynosoma, P. blainviller blainwilei, P. blainviller 
frontale, P. douglassi douglassi, P. platyrhinos, and one repre- 
sentative of the genus Anota, A. maccalli (P. maccalli). A fifth 
Phrynosoma, P. coronatum, has been reported from San Diego, 
California (Cope, 1898). No California specimens of P. coro- 
natum have been available in this study, although plenty of 
Phrynosomas from this locality were at hand. Specimens of 
this species in the collection at Leland Stanford Junior Univer- 
sity were taken at San Telmo, Ensenada, San Jose del Cabo, and 
Santa Anita, Lower California. The majority of. the known 
specimens are from the type locality, Cape San Lucas, Lower 
California. A number of specimens from San Diego County 
near the Mexican line (San Diego, National City, Campo, Dul- 
zura), which were examined, are distinetly P. blainviller blain- 
villei. If P. coronatum is found within the state it certainly is 
not of common oceurrence. The fact that P. coronatum has 
often been used to inelude several species (Girard, 1858; Gentry, 
1885; Ditmars, 1907) leaves the occurrence of this species in this 
state still in question. The two species coronatum and blainvillei 
blainvillei are separated by several distinct characters, so that 
they are easily identified. 
Some doubt also centers around the occurrence of the pigmy 
horned lizard P. douglassi douglassi in northern California. But 
a single definite record, that of Charles H. Townsend (1887), 
from the western base of Mt. Shasta, is known. The type locality 
being the Des Chutes River, Oregon, its occurrence along the 
northern border of the state seems probable. An attempt to 
obtain specimens from the vicinity of Mt. Shasta failed, as did 
