620 



Bulletin American Museum of Natural History 



[Vol. XL VI 



bartolomas and Phrynosoma jamesi are confined to the Pacific Coast, as 

 appears at present, or to what extent these species range into this district. 

 The occurrence of certain species at La Paz (Crotaphytus wislizenii, for 

 example) may indicate a route of migration via the Vizcaino Desert and 

 the Magdalena Plain of the undifferentiated Sonoran elements in the 

 fauna of the Cape district. 



The San Lucan fauna is the most characteristic and the most differ- 

 entiated of the four Lower Californian herpetological faunse though 

 scarcely more distinct from the Colorado Desert fauna than the latter is 

 from the San Diegan. Five, possibly seven, species of the Vizcaino 

 Desert fauna are distinct from the species of the two northern districts. 

 The Cape district has no less than twenty-nine species strictly confined 

 to it. The total number of species recorded from it is fifty-two, as follows. 



Balrachoseps attenuatus 

 Scaphiopus couchii 



Phyllodactylus tuberculosus 

 *Phyllodactylus unctas 

 *Clenosaura hemilopha 

 *Dipso-satirus dorsalis lucasensis 



Crotaphytus collar is baileyi 



Crotaphytus wislizenii 

 *Sauromalus ater 

 *Callisaurus draconoides 



Callisaurus ventralis gabbii 

 *Sceloporus zosteromus 

 *Sceloporus licki 

 *Uta thalassina 



Uta mearnsi 

 *Uta elegans 



Uta microscutata 

 *Uta nigricauda 

 *Phrynosoma coronatum 

 *Gerrhonolus multi-car inatus 

 *Xantusia gilberti 

 * Cn emidoph orus maximus 

 *Verlicaria hyperythra hyperythra 



Verticaria hyperythra schmidti 



Plestiodon shiltonianus 

 *Bipes biporus 



Amphibians 



Bufo punctatus 



Hyla regilla 

 Reptiles 



Siagoriodon humilis 

 *Lichanura trivirgata 



Coluber flagellum piceus 



Coluber lateralis 

 *Coluber aurigulus 



Salvadora hexalepis 



Phyllorhynchus decurtatus 

 *Elaphe rosalise 

 *Pituophis vertebralis 

 *Lampropeltis getulus conjuncta 

 *Lampropeltis californise nitida 



Rhinocheilus lecontei 



Hypsiglena ochrorhynchus ochrorhynchus 



Natrix valida 



Sonora episcopa 

 *Chilomeniscus stramineus 

 *Chilomeniscus punctatissimus 



Chilomeniscus ductus 

 *Tantilla planiceps 



Trimophodon lyrophanes 

 *Crotalus atrox lucasensis 

 *Crotalus enyo 

 *Crotalus mitchellii 

 *Pseudemys ornata nebulosa 



The species starred are confined to this area. The degree of pecu- 

 liarity is much increased if the insular species are included. Since most 

 of these simply represent peninsular forms, I have not included them in 



