UNIVERSITY OF CALITOENIA PUBLICATIONS— (Conttoued) 



21. The Occurrence of a Bhythm In the Geotroplsm of Two Species of 



Plankton Copepods When Certain Eecurring External Conditions are 

 Ahsent, hy 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 85 



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 Euth A. Forsyth. Pp. 439-512, plates 38-46. August, 1917 1.00 



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 CaU- 

 fomia, by Hilda Wood GrinneU. 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 AmmnspermopJiihis nelsoni nelso7n Merriam, by Walter P. 

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



5. Habits and Food of the Roadnmner in California, by Harold C. Bryant. 



Pp. 21-58, plates 1-4, 2 figures in text. October, 1916 „. .36 



6. Description of Bufo canorm, 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. Osteological Eelationships 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 Eeptiles 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, California, by Albert L. Barrows {In press) 



3. Description of Some New Species of Polynoidae 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 



