1896.] Distribution of Batrachia and Reptilia. 1015 
Fifty-eight species, disposed of as follows: Batrachia salien- 
tia, 2; Sauria, 25; Serpentes, 31. Three species of Testud- 
nata are peculiar to this district, viz.: Kinosternum henrici 
Lec., K. flavescens Agass., Xerobates agasizii Cooper. This district 
possesses a larger number of peculiar species than any other in 
the Medicolumbian Region. 
The Basin district has but few peculiar species. Its southern 
boundary may be regarded as the San Francisco Mountains in 
northern Arizona. The Crotalus tigris which is restricted to it 
has been shown by Merriam to inhabit only the mountains, 
and its northern limit is as yet unknown. The following are 
the species of the Great Basin: 
BATRACHIA : Sceloporus consobrinus B. & 
Amblystoma tigrinum Green. . 
Spea intermontana Cope.* Phrynosoma douglassii orna- 
Rana draytonii onca Cope.* tissimum Gird.t 
Rana pipiens brachycephala Anota platyrhina Gird.t 
Cope.* Zamenis tæniatus Hallow.t 
Pityophis sayi bellona B. & 
SAURIA: G.+ 
Orotaphytus collaris Say.t Chionactis episcopus isozonus 
Crotaphytus wislzenii B. & 
G.f Eutænia elegans vagrans B. 
Uta stansburiana B. & G.+ & G 
Sceloporus biseriatus Hal- Crotalus tigris B. & G.t 
low.t Crotalus confluentus lecontei 
Sceloporus graciosus B. & G.t Hallow. 
The species and subspecies peculiar to the Basin district are 
marked with a star, and those found also in the Chihuahuan 
with a dagger. 
The Central district possesses but few peculiar species. These 
with certain Chihuahuan species give it a distinctive character. 
There are also a few species which enter it from the Eastern 
subregion. These are marked with ‘a dagger, while the pecu- 
liar forms are marked with a star. 
