18 CALIFORNIA ACADEMY OF SCIENCES. 



Gerrhonotus principis perhaps is one of its inhabitants. 

 Lampropeltis zonata may be peculiar to it and the Pacific 

 Fauna. The other reptiles of the area are of rather 

 wide distribution. It lacks seven (or eight) species of 

 the Pacific Fauna, and seventeen (or twenty) of the 

 Californian. 



We have seen that there are five life areas in Califor- 

 nia* and that some of these are more closely allied than 

 others. The Desert Fauna bears little resemblance to 

 the San Diegan and Californian, and even less to the 

 Pacific and Sierra Nevadan. Most of its species occur 

 in western Arizona, southern Nevada, and northern 

 Lower California.! It is, in fact, a part of the Lower 

 Austral Zone of Merriam or South Warm Temperate of 

 Allen. The San Diegan and Californian Faunse have 

 more in common. Apparently both belong to the Upper 

 Austral Zone of Merriam, which is the Middle Warm 

 Temperate of Allen. The Pacific and Sierra Nevadan 

 Faunae, also, are closely allied. They form a part of 

 the Transition Zone of Merriam or North Warm Tem- 

 perate of Allen, which, extending northward across 

 western Oregon and Washington, forms another life 

 area, which we may call the Puget Fauna. t It would 

 seem then, that these three zones bend suddenly south- 

 ward (irrespective of altitude) near the Pacific Coast. 

 Thus it happens that their westernmost Faunae lie north 

 and south of each other instead of east and west — the 

 Desert Fauna north of the San Lucan,§ the Californian 

 north of the San Diegan, the Puget north of the Pacific 

 and Sierra Nevadan. 



Too little is known of the rej^tiles of Oregon, Wasli- 



*The colder portions of the mountains have not been considered. 



t Except that part which belongs to the San Diegan Fauna. 



t This is perhaps a part of the Canadian Zone. 



^ The southern end of the peninsula of Lower California. 



