en Habits
in Nature and Reactions in the Laboratory, by Calvin
O. Esterly. Pp. 381-392. March, 1917 .10

21. The Occurrence of a Rhythm in the Geotropism of Two
Species of Plankton Copepods when Certain Recurring
External Conditions are Absent, by Calvin O. Esterly.
Pp. 393-400. March, 1917 .10

22. On Some New Species of Aphroditidae from the Coast of
California, by Christine Essenberg. Pp. 401-430,
plates 31-37. March, 1917 .35

23. Notes on the Natural History and Behavior of _Emerita
analoga_ (Stimpson), by Harold Tupper Mead.
Pp. 431-438,1 text figure. April, 1917 .10

24. Ascidians of the Littoral Zone of Southern California,
by William E. Ritter and Ruth A. Forsyth. Pp. 439-512,
plates 38-46. August, 1917 1.00
Index in preparation.

Vol. 17. 1. Diagnoses of Seven New Mammals from East-Central
California, by Joseph Grinnell and Tracy I. Storer.
Pp. 1-8.

2. A New Bat of the Genus _Myotis_ from the High Sierra
Nevada of California, by Hilda Wood Grinnell. Pp. 9-10.

Nos. 1 and 2-in one cover. August, 1916 .10

3. _Spelerpes platycephalus_, a New Alpine Salamander from
the Yosemite National Park, California, by Charles Lewis
Camp. Pp. 11-14. September, 1916 .05

4. A New Spermophile from the San Joaquin Valley,
California, with Notes on _Ammospermophilus nelsoni
nelsoni_ Merriam, by Walter P. Taylor. Pp. 15-20,
1 figure in text. October, 1916 .05

5. Habits and Food of the Roadrunner in California, by
Harold C. Bryant. Pp. 21-58, plates 1-4, 2 figures in
text. October, 1916 .35

6. Description of _Bufo canorus_, a New Toad from the
Yosemite National Park, by Charles Lewis Camp.
Pp. 59-62, 4 figures in text. November, 1916 .05

7. The Subspecies of _Sceloporus occidentalis_, with
Description of a New Form from the Sierra Nevada and
Sys