76 
TRANSACTIONS OF THE TEXAS ACADEMY OF SCIENCE. 
Valley of the Rio Grande, to the Grand Canon of the Colorado river in 
northern Arizona, the itinerary of which was as follows: Las Cruces 
northwestward to Rincon and Hatch, then north to Las Palomos, follow¬ 
ing the Rio Grande Valley all the way, then across the mesa northwest 
to Cuchilla Negra, west of north to Canada Alamosa, up the Canada and 
out on to the elevated plain at Ojo Caliente; north to Horse Camp and 
Seboy Horse Ranch, west to Horse Spring and Patterson; then west across 
the Continental Divide, north of west to Gallo and Apache Springs, gener¬ 
ally west through the mountains down into Johnson’s Basin (N. M.), 
Pratt’s Ranch (Ariz. line), Coyote Spring, and Springerville (Ariz.); 
northwest to Concho, Woodruff, Holbrook, Winslow, and the San Fran¬ 
cisco wash (north of Canon Diablo), following the Colorado Chiquito all 
the way from aiittle below Concho; south of west to Turkey Tanks and 
Flagstaff, then west of north to A1 Ranch, Hart Little Spring, Cedar 
Ranch, and the Grand Canon at Hance’s, and down into the canon to 
the Colorado river. Returning, the same route was retraced as far as 
Holbrook, with a side trip from Hart Little Spring to the summit of 
San Francisco mountain, then from Holbrook northeast to Carrizo, Bill¬ 
ings, and Navajo Springs; following the railroad and the Rio Puerco of 
the west, and visiting Chalcedony Park on the way; from Navajo 
Springs to Zuni, by way of the Squaw Spring, Wabash Ranch Head¬ 
quarters, G Bar Ranch, and the Zuni river; then east to Ramah, Inscrip¬ 
tion Rock, Tenaja, across the Continental Divide and down through the 
mountains to Grant; south of east along the railroad to Los Lunas in 
the Rio Grande Valley; and then following the Rio Grande down to Las 
Cruces, only leaving its valley to cross the Jornado del Muerto. 
The Transition was encountered on this trip at the following places: 
First between Horse Spring and Patterson, on the hills crossed; next on 
the summits of the hills and ridges to the west of Patterson, 6 miles west 
on the road from Patterson bringing one to the crest of the Continental 
Divide, at an elevation of over 7000 feet. Here the Transition is well 
marked, but disappears as the road descends. Then the road goes up 
over a large, bare mal pais hill, and descends to Gallo Spring. Getting 
into the mountains to the southwest and west of here, and striking the 
Rio Tularosa, the Transition obtains throughout except in the bottoms of 
the lower cahadas or water courses. It continues until the road winds 
down through the mountains and runs out into the beautiful valley 
known as Johnson's Basin. The higher portions of all the mountains in 
sight from this valley, which surround it completely, are Transition , and 
after passing Gatlin’s Ranch near the end of the valley, we again enter 
the Transition at Manguitos Spring. From here westward to where the 
road goes down the frightfully steep hill to the Mormon settlement of 
Luna, it is Transition in all except the lower valleys, until the Arizona 
