Part 6

15. The Kinetonacleus of Flagellates and the Binuclear Theory of Hartmann, by Olive Swezy. Pp. 185-240, 58 figures in text. March, 1916 50

16. On the Life-History of a Soil Amoeba, by Charlie Woodruff Wilson. Pp. 241-292, plates 18-23. July, 1916 .60

17. Distribution of Land Vertebrates of Southeastern Washington, by Lee Raymond Dice. Pp. 293-348, plates 24-26. June, 1916 .60

18. The Anatomy of Heptanchus maculatus: the Endoskeleton, by J. Frank Daniel. Pp. 349-370, pls. 27-29, 8 text figures. December, 1916 .25

19. Some Phases of Spermatogenesis in the Mouse, by Harry B. Yocom. Pp. 371-380, plate 30. January, 1917 .10

20. Specificity in Behavior and the Relation between 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 Systematic 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