94 BULLETIN 56, UNITED STATES NATIONAL MUSEUM. 



thorny mimosas {Mimosa hiuncifera and 3f. 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. 07, altitude 1,573 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. Holzner crossed it July 28, 1892. i 



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 pifion, Cliihuahua 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, 1,267 meters (4,157 feet). Camp was made at Monument 

 No. 73, in the canyon, 293 kilometers (182 miles) from the Rio 

 Grande. Occupied by myself, July 6 to 8, 28 to 29, and August 11, 

 1892 ; August 24 to 30, and October 2, 4, 1893 ; 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 corner 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 was unable to find again, though several days were subsequently 

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

 time. 



a For a description, with illustrations, of this gigantic aboriginal earthwork, 

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

 thropologist for September, 1896. 



