UNIVERSITY or CAIjITOENIA PUBLIC ATIONS— (Continusd) 



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 .K 



11. A Study of the Races of the White-Fronted Goose (Anser aVoifrons) occur- 



ring in California, by H. S. Swarth and Harold C. Bryant. Pp. 209-222, 



2 figures in text, plate 13. October, 1917 _ J5 



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 



IS. The Pacific Coast Jays of the Genus Aphelocoma, by H, S. Swarth. Pp. 



405-422, 1 figure in text. February 23, 1918 J20 



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 



GrinneU. Pp. 431-433. 



Nos. 14 and 15 in one cover. April, 1918 , „ .16 



16. Revision of the Rodent Genus Ajylodontia, by Walter P. Taylor. Pp. 435- 



504, plates 25-29, 16 text figures. May, 1918 , „ .75 



17. The Subspecies of the Mountain Chickadee, by Joseph Grinnell. Pp. 505- 



515, 3 text figures. May, 1918 „ 15 



18. Excavations of Burrows of the Rodent Aplodontia, with Observations on 



the Habits of the Animal, by Charles Lewis Camp. Pp. 517-536, 6 figures 



in text, June, 1918 20 



Index, pp. 537-545. 



Vol. 18. 1. Mitosis in Giardia microti, by William C. Boeck. Pp. 1-26, plate 1. Octo- 

 ber, 1917 35 



2, An Unusual Extension of the Distribution of the Shipworm in San Fran- 



cisco Bay, California, by Albert L. Barrows. Pp. 27-43. December, 1917. .20 



3, Description of Some New Species of Polynoidae from the Coast of Cali- 



fornia, by Christine Essenberg. Pp. 45-60, plates 2-3, October, 1917 .20 



4, New Species of AmpMnomidae from the Pacific Coast, by Christine Essen- 



berg, Pp, 61-74, plates 4-5. October, 1917 _„ .15 



6. Crithidia euryophthatmi, sp. nov., from the Hemipteran Bug, Euryophthalmus 

 convivus Stai, by Irene McCulloch. Pp. 75-88, 35 text figures, Decem- 

 ber, 1917 J15 



6. On the Orientation of Erytliropsis, by Charles Atwood Kofoid and Olive 



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



7. The Transmission of Nervous Impulses in Relation to Locomotion in the 



Earthworm, by John F. Bovard. Pp. 103-134, 14 figures in text. January, 

 1918 .35 



8. The Function of the Giant Fibers in Earthworms, by John F, Bovard, Pp. 



135-144, 1 figure in text. January, 1918 _.. .10 



9. A Rapid Method for the Detection of Protozoan Cysts in Mammalian 



Faeces, by William C. Boeck. Pp. 145-149. December, 1917 05 



10. The Musculature of Eeptanchus maculatus, by Pirle Davidson... Pp. 151-170, 



12 figures in text, March, 1918 .25 



11. The Factors controlling the Distribution of the Polynoidae of the Pacific 



Coast of North America, by Christine Essenberg, Pp. 171-238, plates 6-8, 



2 figures in text, March, 1918-.- _ _.. .75 



12. Differentials In Behavior of the Two Generations of Salpa democratica 



Relative to the Temperature of the Sea, by Ellis L. Michael. Pp. 239-298, 

 plates 9-11, 1 figure in text. March, 1918 .68 



13. A Quantitative Analysis of the MoUuscan Fauna of San Francisco Bay, by 



E. L. Packard. Pp. 299-336, plates 12-13, 6 figs. In text. April, 1918 .40 



14. The Neuromotor Apparatus of Euplotes patella, by Harry B. Yocom. Pp. 



337-396, plates 14-16. September, 1918 „ „ .70 



15. The Significance of Skeletal Variations In the Genus Peridinium, by A. L. 



Barrows. Pp, 397-478, plates 17-20, 19 figures In text. June, 1918 90 



