. Bulletin of the Department of Geology. Geology. 428 University of California Publications. [Geolouy from the head of Big Creek, Humboldt County, Nevada, except- ing possibly a more nearly square form; but it is reasonable to suppose that with more material the fossil form would show some distinct differences between it and the living species. Measurements Mj, anteroposterior diameter M„ transverse diameter Callospermophilus No. 12570 trepidus 1.9 mm. 1.5 mm. 1.9 2.3. 10 11 12 14 Fig. 8.—Citellus, sp. Portion of right mandible with ML. No. 12570, X 4. Figs. 9a and 9b.—Mylagaulus monodon. Left

- Image ID: RGFJ13
. Bulletin of the Department of Geology. Geology. 428 University of California Publications. [Geolouy from the head of Big Creek, Humboldt County, Nevada, except- ing possibly a more nearly square form; but it is reasonable to suppose that with more material the fossil form would show some distinct differences between it and the living species. Measurements Mj, anteroposterior diameter M„ transverse diameter Callospermophilus No. 12570 trepidus 1.9 mm. 1.5 mm. 1.9 2.3. 10 11 12 14 Fig. 8.—Citellus, sp. Portion of right mandible with ML. No. 12570, X 4. Figs. 9a and 9b.—Mylagaulus monodon. Left
Book Worm / Alamy Stock Photo
Image ID: RGFJ13
. Bulletin of the Department of Geology. Geology. 428 University of California Publications. [Geolouy from the head of Big Creek, Humboldt County, Nevada, except- ing possibly a more nearly square form; but it is reasonable to suppose that with more material the fossil form would show some distinct differences between it and the living species. Measurements Mj, anteroposterior diameter M„ transverse diameter Callospermophilus No. 12570 trepidus 1.9 mm. 1.5 mm. 1.9 2.3. 10 11 12 14 Fig. 8.—Citellus, sp. Portion of right mandible with ML. No. 12570, X 4. Figs. 9a and 9b.—Mylagaulus monodon. Left P4. No. 11572, X 1%. Fig. 9a, lateral view; fig. 9b, superior view. Figs. 10, a and b.—Mylagaulus monodon. Left P4. No. 11878, natural size. Fig. a, lateral view; fig. b, superior view. Figs. 11, a and b.—Mylagaulus pristinus. Eight P4. No. 12580, natural size. Fig. a, lateral view; fig. b, superior view. Figs. 12, a and b.—Mylagaulus pristinus. Left P4. No. 12579, natural size. Fig. a, lateral view; fig. b, superior view. Fig. 13.—Eucastor lecontei. P4. No. 11085, X 1%. Fig. ll.—Dipoides, sp. Left P4. No. 12536, X 1%.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. University of California, Berkeley. Dept. of Geology. Berkeley : The University Press