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any of the several springs to be found on the
mountain side. To date I have worked on the Ajusco
side of the cañon, which is the south side, and 
therefore gets less sun each day. It is quite wet
in places.

The Pedregal, Feb. 25, P.M.
This is an area of heavy and extensive lava
flow, with enormous clinkers all over the place.
It is very, very dry; I saw no water in the whole
place. There are many cacti and a few live oaks,
the latter chiefly in hillsides. Pepper trees are 
common, and a few pine are on a higher hillside.
I spent 3 hours here, and saw one lizard, 3 
times. There were many scorpions, pill bugs, black
widows and other spiders, and a few earthworms
under rocks. The Sceloporus was a collared form,
probably fellariperezi, which I couldn't get close
to. Black back and tail, with a hint of chevron 
markings. I saw nothing else there.

Cañon Contreras, Feb. 25, later P.M.
Returned here for another try at the neotenic
salamanders Wagner says he has collected in the
mountain streams here. I found no salamanders,
but I did see salamander eggs, attached to the under
side of a rock in a mountain pool. They were
individually attached. Each was about 3/4 inch in diameter, including gelatin. The eggs, in the neurula stage, were about 1/4 inch in diameter, longer than broad.
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Cañon Contreras, Feb. 26, A.M.
Crossed the cañon to the other side, where 
the sun strikes in early morning, and shines all
day. This is the North Bank, with a southern
exposure, on the slope of San Miguel. This side
is considerably drier than the other, with little
or no water. There were no streams where I
worked. There were a few oak trees, with yucca, 
cactus, and maguey on the slope. I found a
Sceloporus under a rock on this slope, of the
same species as those on the houses in the city.
I have seen them in Chapultepec Park and at
the Los Angeles Court.

Pedregal, Feb. 26, P.M.
Returned with a gun to try again for the 
single Scelop, but I couldn't even find him. The 
heat of the afternoon is intense, and the lizards
probably do no sunning then. Got nothing.
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