UNIVEKSITY OF OAIiEFOENIA PUBLICATIONS— (Oontlnuod) 



21. The Occurrence of a Ehythm in the Greotroplsm of Two Species of 



Plankton Copepods Wlien Certain Becurring External Conditions are 

 Absent, by Calvin O. Esterly. Pp. 393-400. March, 1917 10 



22. On Some New Species of Apbroditidae 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 analog a (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 Buth A. Porsyth. 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 Cali- 

 fornia, by Hilda Wood Grlmiell. Pp. 9-10. 



Nos. 1 and 2 in one cover. August, 1916 „ J.6 



S. Spelerpes plutycephalus, a New Alpine Salamander from the Yosemlte 

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

 tember, 1916 _ - .05 



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



Notes on Ammospermophilus nelsoni nelsoiii Merriam, by Walter P. 

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



5. Habits and Pood of the Boadrunner In California, by Harold C. Bryant, 



Pp. 21-58, plates 1-4, 2 figurea In text. October, 1916 ....._ M 



6. Description of Biifo canorus, a New Toad from the Yosemlte 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 Eelatlonshlps 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 



11. A Study of the Baces 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 



Vol. 18. 1. IMltosis 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. De- 

 cember, 1917 - 20 



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



CaUfomia, 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 



5. Crithidia Euryophthahni, sp. nov., from the Hemipteran Bug, Euryoph- 



thalmus Convims Stai, by Irene McCuUoch, Pp. 75-88, 35 text fig- 

 ures). December, 1917 (In press) 



6. On the Orientation of Erythropsis, by Charles Atwood Eofold and 



Olive Swezy. Pp. 89-102, 12 figures in text. December, 1917 15 



