1916] Introduction 



LITERATURE CITED 



Herdman, W. a. 



1907. The Marine Biological Station at Port Erin. 21st Ann. Rep., Mar. 



Biol. Sta. Port Erin, 62 pp., 14 figs, in text. 

 1008. Ibid., 22n(l Ann. Rep., 68 pp. 24 figs, in text. 

 KOFOID, C. A. 



1910. The biological stations of Europe. Bull. U. S. Bur. Education, No. 



440, 360 pp. .55 pis., 48 figs, in text. 



OSTWALD, W. 



1902. Zur Theorie des Planktons. Biol. Centralbl., 22, 596-605, 609-638. 

 RiTTEK, W. E. 



1905. A general statement of the ideas and present aims and status of the 



Marine Biological Association of San Diego. Univ. Calif. Publ. 



Zool., 2, i-xvii, 2 maps. 



1908. The scientific work of the San Diego Marine Biological Station dur- 



ing the year 1908. Science (n. s.), 28, 329-333. 

 1915. The biological laboratories of the Pacific Coast. Pop Sei. Mo., 86, 

 223-232. 



ElTTER, W. E. AND JOHNSON, M. E. 



1911. The growth and differentiation of the chain of Cyclosalpa affinis 



Chamisso. Journ. Morphol., 22, 395-453, pis. 1-4, figs. 1-10 in text. 

 Thorxdike, E. L. 



1904. An introduction to the theory of mental and social measurements. 

 (New York, Science Press), xii + 212 pp., 87 figs, in text. 

 Whitman, C. O. 



1902. A biological farm for the experimental investigation of heredity, 

 variation, and evolution, and for the study of life-histories, habits, 

 instincts, and intelligence. Science (n.s.), 16, 504—510. 

 Yerkes, R. M. 



1914. The Harvard Laboratory of Animal Psychology, and the Franklin 

 Field Station. Journ. Animal Behav., 4, 176-184, figs. 1-2 in text. 



