1224 REPORT OF NATIONAL MUSEUM, 1898. 



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 peculiar forms are marked with a 

 star. 



URODELA. 



Amhlystoma tigrinum Green. 



SALIENTIA. 



Btifo eognatus Say.* 



Spea hammondii honibifrons Cope.* 



SBRPENTES. 



Heterodon nasicus nasicus Baird and Girard.* 



Ophiholus nmltistratus Kennicott.* 



Zamenis constrictor Linna^us.t 



Exitcenia radix Baird and Girard. t 



Eutxcnia sirtaUs parietnlis Say. 



Eutamia elegans vagrans Baird and Girard. 



Crotalus confluentus confluentus Say.* 



SAURIA. 



Grotapliytus coUaris Say. 



Holhroolia macnlata Baird and Girard. 



Phrynosoma douglassii hernandesii Girard.* 



Eumeces septentrionaUs Baird.* 



Eumeces multivirgatns Hallowell.* 



Eumeces ohsoletns Baird and Girard. 

 The species not marked with dagger or star are Chihuahuan, except 

 Eutania elegans vagrans, which is also found in the Basin district; E. 

 sirtalis parictalis^ which extends to the Pacific district, and the Amhly- 

 stoma tigrinum, which is Medicolumbian throughout. 

 The total number of species of the Sonoran subregion is as follows: 



Peculiar to the Arizonian district 58 



Common to the Lower California and Chihuahuan districts 19 



Peculiar to the Lower California district 14 



Peculiar to the Basin district 6 



Common to the Basin and Chihuahuan 8 



Peculiar to the Ceutral district ^ 



Common to the Central and Chihuahuan '^ 



Common to the Chihuahuan and Texan 1^ 



-130 

 Counted twice 4 



Total 126 



