tematic Notes on Other California Lizards, by
Charles Lewis Camp. Pp. 63-74. December, 1916 .10

8. Osteological Relationships of Three Species of Beavers,
by F. Harvey Holden. Pp. 75-114, plates 5-12, 18 text
figures. March, 1917 .40

9. Notes on the Systematic Status of the Toads and Frogs of
California, by Charles Lewis Camp. Pp. 115-125, 3 text
figures. February, 1917 .10

10. A Distributional List of the Amphibians and Reptiles of
California, by Joseph Grinnell and Charles Lewis Camp.
Pp. 127-208. 14 figures in text. July, 1917 .35

11. A Study of the Races of the White-Fronted Goose
(_Anser albifrons_) Occurring in California, by H.
S. Swarth and Harold C. Bryant. Pp. 209-222, 2 figures
in text, plate 13. October, 1917 .15

12. A Synopsis of the Bats of California, by Hilda Wood
Grinnell. Pp. 223-404, plates 14-24, 24 text figures.
January 31, 1918 2.00

13. The Pacific Coast Jays of the Genus _Aphelocoma_,
by H. S. Swarth. Pp. 405-422, 1 figure in text.
February 23, 1918 .20

14. Six New Mammals from the Mohave Desert and Inyo Regions
of California, by Joseph Grinnell. Pp. 423-430.

15. Notes on Some Bats from Alaska and British Columbia,
by Hilda Wood Grinnell. Pp. 431-433.

Nos. 14 and 15 in one cover. April, 1918 .15

16. The Subspecies of the Mountain Chickadee, by Joseph
Grinnell. Pp. 505-515, 3 figures in text.
May 4, 1918 .15

Vol. 18. 1. Mitosis in _Giardia microti_, by William C. Boeck.
Pp. 1-26, plate 1. October, 1917 .35

2. An Unusual Extension of the Distribution of the Shipworm
in San Francisco Bay, California, by Albert L. Barrows.
Pp. 27-43. December, 1917 .20

3. Description of Some New Species of _Polynoidae_ from the
Coast of California, by Christine Essenberg. Pp. 45-60,
plates 2-3. Octobe