94 BULLETIN 56, UNITED STATES NATIONAL MUSEUM. 



thorny mimosas {Mimosa biuncifera and M. lindheimeri) , and bear- 

 berries (Rhamnus purshiana), together with innumerable bushes 

 and herbs. 



Station No. 22. — Animas Valley. This is a grassy, treeless plain, 

 272 kilometers (169 miles) from the Rio Grande. The astronomical 

 camp was located at Monument No. <>7, altitude 1,578 meters (5,161 

 feet), near the middle of it. At this point an enormous artificial 

 dam stretches across the Animas Valley. After heavy rains a large 

 lake is formed, which is frequented by waterfowl and game of 

 all kinds. I am indebted to the members of the astronomical party 

 for numerous specimens, especially such as were drowned by a sud- 

 den flooding of the valley after a heavy rain. I crossed the Animas 

 Valley seven times— July 6, 14, 18, and 28, 1892; August 30 and 31, 

 and October 2, 1893. Mr. I lolzner crossed it July 28, 1892. 



Station No. 23. — Cloverdale, Grant County, New Mexico. Springs 

 of pure cold water are found in a little valley among the hills east 

 of the Animas Valley, only a few miles from the Arizona-New Mex- 

 ico Line and 6 miles north of Monument No. 69. In a canyon a few 

 miles south of Cloverdale is a larger spring and stream, emptying 

 into Guadalupe Canyon, and much frequented by bear, deer, and 

 other large game. I was in that place from July 14 to 18, 1892, col- 

 lecting plants and animals. 



Vegetation. — The region is more or less forested, the principal 

 trees being Mexican pirion. Chihuahua pine, longstalk willow, Fre- 

 mont cottonwood, blue oak, Emory oak, whiteleaf oak, Mexican 

 walnut, and leatherleaf ash. Grape, mimosa, and mescal are also 

 abundant. 



Station No. 24. — Hall's Ranch, Guadalupe Canyon, Sonora, Mex- 

 ico, altitude, L,267 meters (4,157 feet). Camp was made at Monument 

 No. 73. in the canyon. 203 kilometers (182 miles) from the Rio 

 Grande. Occupied by myself, July f> to 8, 28 to 2!). and August 11. 

 1892; August 24 to 30, and October 2, 4. L893; by Mr. Holzner July 

 28 and 29, 1892. The canyon is sparsely wooded with sycamore, red 

 juniper, oak, ash, mulberry, and grape. Much of the rock is rhyo- 

 lite and brown or yellowish andesitic basalt. 



In the southeastern coiner of Arizona, about 3 miles from Monu- 

 ment No. 73, a large deposit of Tertiary fossils was shown us by 

 Mr. Hall. A few of them were brought away, but a very large quan- 

 tity of beautifully preserved specimens were left on the spot, which 

 I A\as unable to find again, though several days were subsequently 

 spent in attempting to do so, Mr. Hall Inning been killed in the mean- 

 time. 



"For a description, with illustrations, of* this gigantic aboriginal earthwork. 

 by Cai»t. D. D. Gaillard, Corps of Engineers, U. S. Army, see the American An- 

 thropologist for September, 1896. 



