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OTTO HARRASSOWITZ, R. FRIEDLAENDER & SOHN, 



LEIPZIG. BERLIN. 



Agent for the series in American Arch- Agent for the series in American Arch- 

 aeology and Ethnology, Classical Philology, aeology and Ethnology, Botany. Geology, 

 Education, Modern Philology, Philosophy, Geography, Mathematics, Pathology, Physi- 

 Psychology, History. ology, Zoology, and Memoirs. 



ZOOLOGY. — W. E. Ritter and C. A. Kofoid, Editors. Price per volume, $3.50. Commenc- 

 ing with Volume n, this series contains Contributions from the Laboratory of the 

 Marine Biological Association of San Diego. 



Cited as Univ. Calif. Publ. Zool. 

 Volume 1, 19C2-1905, 317 pages, with 28 plates _...$3.50 



Volume 2 (Contributions from the Laboratory of the Marine Biological Associa- 

 tion of San Diego), 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 $3.50 



Vol. 6. 1. (XXHI) On the Weight of Developing Eggs. Part I, The Possible 

 Significance of Such Investigations, by William E. Ritter; Part II, 

 Practicability of the Determinations, by Samuel E. Bailey. Pp. 1-10. 

 October, 1908 .10 



2. (XXIV) The Leptomedusae of the San Diego Region, by Harry Beal 



Torrey. Pp. 11-31, with 11 text-figures. February, 1909 20 



3. (XXV) The Ophiurans of the San Diego Region, by J. F. McClen- 



don. Pp. 33-64, plates 1-6. July, 1909 30 



4. (XXVI) Halocynthia johnsoni n. sp.: A comprehensive inquiry as to 



the extent of law and order that prevails in a single animal species, 



by Wm, E. Ritter. Pp. 65-114, plates 7-14. November, 1909 50 



5. (XXVII) Three Species of Cerianthus from Southern California, by 



H. B. Torrey and F. L. Kleeberger. Pp. 115-125, 4 text-figures. 

 December, 1909 10 



6. The Life History of Trypanosoma dimorphou Dutton & Todd, by 



Edward Hindle. Pp. 127-144, plates 15-17, 1 text-figure. December, 

 1909 50 



7. (XXVin) A Quantitative Study of the Development of the Salpa 



Chain in Salpa fusiformis-runcinata, by Myrtle Elizabeth Johnson. 



Pp. 145-176. March, 1910 - 35 



8. A Revision of the Genus Ceratocorys, Based on Skeletal Morphology, 



by Charles Atwood Kofoid. Pp. 177-187. May, 1910 10 



9. (XXIX) Preliminary Report on the Hydrographic Work Carried on by 



the Marine Biological Station of San Diego, by George F. McEwen. 



Pp. 189-204; text-figure and map. v May, 1910 _ 15 



10. (XXX) Biological Studies on Corymorpha. HI, Regeneration of Hy- 



dranth and Holdfast, by Harry Beal Torrey. Pp. 205-221; 16 text- 

 figures. 



11. (XXXI) Note on Geotropism in Corymorpha, by Harry Beal Torrey. 



Pp. 223-224; 1 text-figure. 



Nos 10 and 11 in one cover. August, 1910 20 



12. The Cyclostomatous Bryozoa of the West Coast of North America, by 



Alice Robertson. Pp. 225-284; plates 18-25. December 1910 60 



13. Significance of White Markings in Birds of the Order Passeriformes, 



by Henry Chester Tracy. Pp. 285-312. December, 1910 25 



14. (XXXIII) Third Report on the Copepoda of the San Diego Region, by 



Calvin Olin Esterly. Pp. 313-352; plates 26-32. February, 1911 40 



15. The Genus Gyrocotyle, and Its Significance for Problems of Cestode 



Structure and Phylogeny, by Edna Earl Watson. Pp. 353-468; plates 



33-48. June, 1911 1-00 



Index, pp. 469-478. 



* Roman numbers indicate sequence of the Contributions from the Laboratory of the 

 Marine Biological Association of San Diego. 



