1010 The American Naturalist. [December, 
Sixty-one species and subspecies, making a total for the 
Austroriparian as follows : 
Gunemally distributed; cc dss ie ho. L a 
Shared with the Eastern subregion, . : ; ; 34 
Ontonibiemetly p40. uke . pias on ae 
Louisianian and Ocmulgian only, . : ‘ ; 2 
Texan exclusively (in the subregion), . . . . 38 
115 
The species which enter the Texan territory from the So- 
noran extend to various distances to the north and east. Thus, 
Crotaphytus collaris ranges to southern Missouri, and Holbrookia 
maculata to Arkansas. - Sceloporus spinosus extends along the 
Gulf States to western Florida. Phrynosoma cornutum extends 
eastward to Dallas, Texas. Rhinochilus lecontei on the other 
hand has not been found east of Austin. Several species from 
the extreme southwest of Texas have not been included in the 
above lists, since some of them are well-known to belong to the 
Central American fauna, while the range of others is probably 
similar, but is not sufficiently known. Of the former kind are 
Drymobius margaritiferus Schl., Sibon albofuscum Lac., and 
Coniophanes imperialis B. & G. ; of the latter are Lystoptychus la- 
teralis Cope, Holbrookia propinqua B. & G. and Hypopachus 
cuneus Cope. 
_V. THE FLORIDAN SUBREGION. 
The species and subspecies peculiar to this subregion are the 
following : 
BATRACHIA : Osceola doliata parallela 
Pseudobranchus striatus Lec. Cope. 
Hyla gratiosa Lec. Stylosoma extenuatum 
Rana areolata æsopus Cope: Brown. 
SAURIA : eet Eutænia sackenii Kenn. 
. Seminatrix pygæa Cope. 
Ewmeces egregius Bd. i 
Rhi . Bd Natria usta Cope. 
neura floridana Bd. Natriz  compressicauda 
SERPENTEs: 
Coluber rosaceus Cope. 
Coluber guttatus sellatus 
Cope. 
