UNIVBESITY OP CAIiEFOENIA PUBLICATIONS— (Continued) 



21. The Occurrence of a Khythm 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 (Stimp- 



son), 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. 



Bitter and Ruth A. Forsyth. Pp. 439-512, plates 38-46. August, 1917 1.00 



VoL 17. 1. Diagnoses of Seven New Mammals from East-Central Califomia, by 

 Joseph GrlnneU and Tracy I. Storer. Pp. 1-8. 

 2. A New Bat of the Genus Myotis from the High Sierra Nevada of Cali- 

 fomia, by Hilda Wood Grinnell. Pp. 9-10. 



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



S. Spelerpes platycephalus, a New Alpine Salamander from the Yosemite 

 National Park, California, by Charles Lewis Camp. Pp. 11-14. Sep- 

 tember, 1916 - .06 



4. A New Spermophile from the San Joaquin Valley, California, with 



Notes on Ammosperviophilus nelsoni nclaoni Merriam, by Walter P. 

 Taylor. Pp. 15-20, 1 figure in text. October, 1916 05 



5. Habits and Food of the Eoadrunner In Califomia, by Harold C. Bryant. 



Pp. 21-58, plates 1-4, 2 figures in text. October, 1916 38 



6. Description of Bufo canorus, a New Toad from the Yosemite National 



Park, by Charles Lewis Camp. Pp. 59-62, 4 figures In text. Novem- 

 ber. 1916 - .06 



7. The Subspecies of Sceloporus occidentalis, with Description of a New 



Form from the Sierra Nevada and Systematic Notes on Other Cali- 

 fornia Lizards, by Charles Lewis Camp. Pp. 63-74. December, 1916 .10 



8. Osteologlcal 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. Febmary, 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 85 



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, Califomia, by Albert L. Barrows (In press) 



3. Description of Some New Species of Folynmdae From the Coast of 



California, by Christine Essenberg. Pp. 45-60, plates 2-3. October, 



1917 - 20 



4. New Species of Aphinomidae From the Pacific Coast, by Christine 



Essenberg. Pp. 61-74, plates 4-5. October, 1917 15 



