318 NORTH AMERICAN FAUNA. [No. 7. 



Panamint Valley. — Common. 



Death Valley. — Common, beginning to flower at Saratoga Springs 

 April 26 (flowers green). 



Dee}) Spring Valley. — Occurs on the west side in the wash leading up 

 to the pass over the White Mountains. 



NEVADA. 



Pahrump Valley. — Common, reaching up to the divide near Mountain 

 Spring on the Charleston Mountains, at an altitude of l r 700 meters 

 (5,600 feet). 



Vegas Valley. — Commou. 



Bitter Springs. — Common in the Muddy Mountains and in flower 

 May 5. 



Valley of the Virgin and Lower Muddy. — Common on the gravel mesa 

 between the Muddy and Virgin rivers. 



Fish Lalce Valley. — Occurs and ranges up on northwest slope of Mount 

 Magruder to 1,950 meters (6,400 feet). 



Grapevine Canon. — Occurs. 



Timpahute and Desert mountains. — Occurs. 



Pahranagat Valley. — Common. 



Pahranagat Mountains. — Occurs. 



UTAH. 



Beaverdam Mountains. — Comes up on the northwest slope of the Bea- 

 verdam Mountains to 1,150 meters (3,800 feet) from the Upper Virgin 

 Valley. 



Santa Clara Valley. — Common in the Lower Santa Clara Valley in 

 the neighborhood of St. George, but not observed on the east slope of 

 the Beaverdam Mountains. In the Upper Santa Clara Valley it is 

 replaced by the larger and much handsomer densely-spined species 

 O. whipplei. 

 Opuntia -whipplei. (Plate ix.) 



This remarkable species, noteworthy on account of the closeness of 

 its branches, the shortness of its joints, and the multitude of its spines, 

 is abundant in patches among the juniper and sagebrush along the 

 Upper Santa Clara River, near the upper, crossing in Utah,' at an alti- 

 tude of about 1,525 meters (5,000 feet); and was found also on the west 

 slopes of the Highland and Juniper ranges in Nevada, but was not seen 

 elsewhere. On the west slope of the Juniper Plateau it was found 

 between the altitude of 1,830 and 1,980 meters (6,000 and 6,500 feet). 

 The fruit differs from that of O. echinoearpa in bearing few or no serines. 



Opuntia parryi. (Plate x.) 



This species was found only in Indian Spring Valley, Nevada, 

 and on the west slope of the Charleston Mountains, below Mountain 

 Spring. In Indian Spring Valley it is confined to a limited area about 

 17 miles west of Indian Spring on and near the low divide between this 



