78 
TRANSACTIONS OF THE TEXAS ACADEMY OF SCIENCE. 
summer of 1894, a trip was undertaken from Las Cruces to the falls of 
the West Fork of the Gila headwaters, in southwestern New Mexico. The 
itinerary was as follows: From the Rio Grande valley westward to 
Florida station, by way of Picacho, the Lineas (a range of low hills), 
Mason’s Ranch, the Madelina Mountains, and Carpenter’s Wells. Then 
northwest to Hadley and Cook’s Peak, west to the Rio Mimbres, up the 
Mimbres valley in a general northerly direction to Mimbres Mill, with a 
side trip from latter west through mountains to Georgetown; from Mim¬ 
bres Mill still up the Mimbres valley to a ranch some ten miles up, where 
valley forks. Here the main valley was left, and turning northwest the 
divide between the Mimbres and Rio Sapillo was crossed, and the valley 
of the latter followed nearly west to Hill’s Ranch on the Sapillo; then 
northwest over the mountain and down a most formidable road into the 
valley or canon of the Gila, and on up to Gila Hot Springs (or Hill’s 
Ranch on the Gila). Frgm here north to the confluence of the West Fork, 
and then northwest up this fork to the falls of the West Fork. Return¬ 
ing to Gila Hot Spings, an entirely different and, as it proved, better 
road was taken back, going up the East Fork of the Gila in a general 
northeasterly direction to the DD Bar Ranch ; then northward above 
here, climbing a tongue of land where the canon forks, and through 
mountains up and down hill, coming out into a beautiful level basin or 
plain, at the head of which the Y Cross T Ranch is reached. From here 
eastward, climbing at once into the Black Range Mountains, crossing the 
Continental Divide, and then going down into Corduroy Capon. Fol¬ 
lowing up Corduroy Canon north to its end, where it opens out on the 
plain in two long draws, the eastern draw was followed about two miles, 
when a northeasterly course was taken over hills and through vales, up 
and down, until about twenty-five miles fuiTner on we emerge from the 
mountains and later reach Fairview. From Fairview southeast to Willow 
Spring and Cuchilla Negra, east to the Rio Grande valle}', across the lat¬ 
ter and on to Engle; then south along the railroad to Las Cruces, except 
to cross the Jornada del Muerto from Upham to Leasburg. 
During this trip, the Transition was encountered at the following 
points: A touch of it on higher portions of Coop’s Peak, and on hills 
around Georgetown; it was struck in earnest on the divide between the 
Mimbres and Sapillo valleys, and continued down the sides nearly to the 
bottom of the canon of the Gila. It covers all the country up the West 
Fork of the Gila, except the bed of the canon as far up as the falls. 
Above the falls, the whole is Transition. The Boreal is quite well marked 
on the higher portions of this upper West Fork country, and Ursus occurs 
commonly, as it does also up the Middle Fork. Cariacus virginianus and 
C. macroiis both occur here on the West Fork, also Meleagris mexicana, 
and the stream is full of mountain trout ( Salmo 2 spp). Below the 
