38 University of California Pnhlications in Zoology [^ol. 13 



distribution and the behavior of the ctenophores of this region. It 

 deals mainly with Pleurohrachia since it is the only one that is found 

 often enough to make a detailed study justifiable. Many of the state- 

 ments made are facts that are derived from our present data. The 

 bearing of some of the things known is not understood, but we have 

 found out something about the biology of the ctenophores. What- 

 ever appears to be of the nature of a conclusion must be regarded as 

 tentative, but it is hoped that the recorded observations will prove 

 suggestive. The present indecision in certain regards does not make 

 it less desirable to bring out what we can. 



Occidental College, Los Angeles, California. 

 Transmitted October 31, 1913. 



BIBLIOGRAPHY 



BiGELOW, H. B. 



1912. Reports of the scientific results of the expedition to the eastern 

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 College, 54, 369-404, pis. 1, 2. 



ESTERLY, C. O. 



1912. The occurrence and vertical distribution of the Copepoda of the 

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1910. Planktonkunde (Leipzig und Berlin, B. G. Teubner). xvi + 723, 1 pi., 

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1904. The ctenophores of the San Diego Region. Univ. Calif. Publ., 

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