352 NORTH AMERICAN FAUNA. [No. 7. 



California, a little above the south end of Fish Lake Valley, June 9. 

 The flowers are red. 



Echinocactus wislizeni lecontei. 



This large barrel-cactus is not common in the region traversed. In 

 California it was found in the Panainint Mountains (common in Sur- 

 prise Canon). 



NEVADA. 



Virgin Mesa. — Common on the high gravel mesa between the Virgin 

 and Muddy valleys. 



UTAH. 



Beaverdam Mountains. — Found on the west slope of the Beaverdam 

 Mountains between 730 and 1,340 meters (2,400-4,400 feet), but not 

 seen on the east slope. 



Mamillaria, 



Owing to the uncertainty respecting the species of Mamillaria ob- 

 served, our notes are of very little value. Eepresentatives of the genus 

 were found in the following localities in Nevada: Mountain Spring, 

 Charleston Mountains ; Great Bend of the Colorado Biver; Bitter 

 Springs (where it was in flower May 5, flowers rich red) ; and on steep 

 gravel slopes near the boundary between Arizona and Nevada on the 

 west side of the Virgin Valley. 



Yucca baccata. (Plate xn.) 



This elegant yucca is by far the handsomest species growing in the 

 desert regions of the Southwest, where it was found in the following- 

 localities : 



NEVADA. 



Charleston Mountains. — Yucca baccata was first seen on the west slope 

 (Pahrump Valley side) of the Charleston Mountains, in the upper part 

 of the tree yucca belt, at an altitude of about 1,430 meters (4,700 feet), 

 whence it ranges up to the divide at Mountain Spring, a little less 

 than 1,830 meters (or 6,000 feet), and down on the east side to 1,340 

 meters (4,400 feet), where it was mixed with Yucca macrocarpa. It was 

 budding abundantly April 30, but only a few flowers had expanded. 



Indian Spring Valley.— Tolerably common at the north end of the 

 north arm of Indian Spring Valley at an altitude of about 1,400 meters 

 (4,600 feet), whence it ranges up toward Hungry Hill Summit to 1,700 

 meters (5,600 feet), where it was flowering in great perfection May 27. 



Timpaliute and Desert Mountains. — Occurs sparingly in the neighbor- 

 hood of Mud or Summit Spring. 



Paliranagat Valley. — Occurs sparingly on the west side of the valley, 

 beginning about a mile from the bottom at an altitude of 1,270 meters 

 (4,200 feet) and ranging up to 1,400 meters (4,600 feet). 



Eylco Mountains. — Occurs sparingly along the open canon or wash- 

 leading from Pahroc Plain into Paliranagat Valley. 



