UNIVERSITY OF CALIFORNIA PUBLICATIONS 



Note. — The University of California Publications are offered in exchange for the publi- 

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 all the publications of the University will be sent upon request. For sample copies, lists 

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 PRESS, BERKELEY, CALIFORNIA, U. S. A. All matter sent in exchange should be 

 addressed to THE EXCHANGE DEPARTMENT, UNIVERSITY LIBRARY, BERKELEY, 

 CALIFORNIA, U.S.A. 



WILLIAM WESLEY & SONS, LONDON 



Agent for the series in American Archaeology and Ethnology, Botany, Geology, 



Physiology, and Zoology. 



ZOOLOGY.— C. A. Kofoid, S. J. Holmes, and J. Grinnell, Editors. 



This series contains the contributions from the Department of Zoology, from the 

 Marine Laboratory of the Scripps Institution for Biological Research, at La Jolla, 

 California, and from the California Museum of Vertebrate Zoology In Berkeley. 



Cited as Univ. Calif. PubL ZqoL 



Volume 1, 1902-1905, 317 pages, with 28 plates _ _ _ _ $3.50 



Volume 2, 1904-1906, xvii + 382 pages, with 19 plates ... $3.50 



Volume 3, 1906-1907, 383 pages, with 23 plates _ _ _. $3.50 



Volume 4, 1907-1908, 400 pages, with 24 plates ..._ _ $3.50 



Volume 5, 1908-1910, 440 pages, with 34 plates ..._ _ _ _ $3.60 



Volume 6, 1908-1911, 478 pages, with 48 plates ..._ _ _ _ $3.50 



Volume 7, 1910-1912, 446 pages, with 12 plates „ „ _ $3.60 



Volume 8, 1911, 357 pages, with 25 plates _ _ _ _ $3.50 



Volume 9, 1911-1912, 365 pages, with 24 plates $3.50 



Volume 10, 1912-1913, 417 pages, with 10 plates .._ _ _ _ -. $3.60 



Volume 11, 1912-1914, 538 pages, with 26 plates _ _ $5.00 



Volume 12, 1913-1916, 658 pages, with 22 plates _ _ $5.00 



Volume 13, 1914-1916, 529 pages, with 39 plates _ $5.00 



Volume 14, 1914 1918, 452 pages, with 60 plates _ _ _ $5.00 



Volume 15, 1915-1916, 360 pages, with 38 plates _ _ $4.00 



Volume 16, 1915-1917, 522 pages, with 46 plates _ _ _ _ _ _ _.. $5.00 



Volume 17, 1916-1918, 545 pages, with 24 plates ..._ _ _ _. $5.00 



Volume 18, 1917-1919, 629 pages, with 20 plates _ _ $5.00 



Volume 19, 1919-1920, 480 pages, with 33 plates $5.00 



Vol. 19. 1. Reaction of Various Plankton Animals with Reference to Their Diurnal 



Migrations, by Calvin O. Esterly. Pp. 1-83. April, 1919 .86 



2. The Pteropod Dcsmoptcrus pacificus (sp. nov.), by Christine Essenberg. Pp. 



85-88, 2 figures in text. May, 1919 .._ _ _ _ .06 



5. Studies on Giardia microti, by William C. Boeck. Pp. 85-136, plate 1, 19 



figures in text. April, 1919 . .60 



4. A Comparison of the Life Cycle of CrithiJia with that of Trypanosoma In 

 the Invertebrate Host, by Irene McCulloch. Pp. 135-190, plates 2-6, 3 

 figures In text. October, 1919 _ _ _ _ _ _ _ 60 



6. A Muscld Larva of the San Francisco Bay Region Which Sucks the Blood 



of Nestling Birds, by O. E. Plath. Pp. 191200. February, 1919 ..._ _ .10 



6. Binary Fission in Collodictyon triciliatum Carter, by Robert Clinton Rhodes. 



Pp. 201-274, plates 7-14, 4 figures in text. December, 1919 1.00 



7. The Excretory System of a Stylet Cercaria, by William W. Cort. Pp. 275- 



281, 1 figure In text. August, 1919 : _ .10 



8. A New Distome from Sana aurora, by William W. Cort. Pp. 283-298, 5 



figures in text. November, 1919 _ _ - - .80 



9. The Occurrence of a Rock-boring Isopod along the Shore of San Francisco 



Bay, California, by Albert L. Barrows. Pp. 299-316, plates 15-17. De- 

 cember, 1919 _ .26 



10. A New Morphological Interpretation of the Structure of Noctiluca, and Its 

 Bearing on the Status of the Cystoflagellata (Haeckel), by Charles A. 

 Kofoid. Pp. 317-334, plate 18, 2 figures in text. February, 1920 .25 



