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PLATES
| UNIVERSITY OF CALIFORNIA |
[GRINNELL-STORER] PLATE 29 |
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Yosemite Pocket Gopher in action,
showing (c) method of digging with fore feet, (b, d)
manner in which earth is pushed out from burrow and (a) way in
which gopher keeps part of its body in the burrow when alert to events
above ground. The prominent forward-projecting vibrissae ("whiskers"),
the small eyes placed on upper surface of head, and the small ears are
shown to advantage. (top to bottom) For discussion see text, p.
137.
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| UNIVERSITY OF CALIFORNIA |
[GRINNELL-STORER] PLATE 30 |
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Winter earth cores made by Pocket
Gophers. (top, left to right)
a. Cores on surface of meadow three miles east of Chinquapin, May
20, 1919, as left after departure of winter snow.
b. Manner in which superimposed earth cores put up in snow during
winter serve to bury rocks and thus develop a surface layer of soil.
(Photo taken in Lyell Cañon, July 21, 1915 )
c. Fresh workings put up during an eight-inch fall of snow in
Yosemite Valley. (Photo taken after a thaw, November 11, 1915.)
d. Rain-beaten cores covering up pine needles and branches on
slopes near Tuolumne Meadows. (Photographed July 10, 1915.)
See text, p. 139.
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| UNIVERSITY OF CALIFORNIA |
[GRINNELL-STORER] PLATE 31 |
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a. Living Sierra Mountain Beaver
(Aplodontia captured near head of Lyell Cañon, July 17,
1915. Note the small eye and ear, the apparent lack of tail, and the
sluggish appearance of the animal. The matted condition of the pelage is
due to its being wet. (top)
b. Mouth of burrow of Sierra Mountain Beaver in boggy ground at
Porcupine Flat. Photograph taken July 2, 1915. (bottom) See text, p.
156.
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| UNIVERSITY OF CALIFORNIA |
[GRINNELL-STORER] PLATE 32 |
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a. Southern Sierra Marmot,
photographed in rock slide in Lyell Cañon, July 20, 1915.
(top)
b. Typical perch of Marmot in glade near margin of Tuolumne
Meadows, photographed July 8, 1915. (bottom)
For account of the species, see text, p. 158.
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