93 
elevation of 500 or 600 feet. These slopes bore evidences of an 
extremely low rainfall, and here many desert forms reached their 
maximu ment, among which may be mentioned Fou- 
ae oe (ocotillo) with its grotesquely crooked branches 
enty-five feet in length. Parose/a here becomes a 
=. (see ae 23) and a belt midway between the mountain and 
the sea is occupied by the singular “copal quien” (Veatchia), 
while Opuntias and Cereuses of species unlike their northern rela- 
Fig. 14. ‘Copal quien’? (Veatchia sp.), Near San Felipe Bay. 
tives find a foothold in the open intervals. Perhaps the most 
interesting a Ral distribution of this lower plain i is the pres- 
ence of th tus (Cereus Pecten-ab ) of southern 
Sonora which probably finds its northern limit near here. Palo- 
cereus Schottii also grows here in extensive grov 
Excursions afoot were made from the camp on ae beach and 
the sloping delta explored for many miles. An outfit for a tem- 
porary dry camp was carried back to the foot of the outermost 
