160 BIBLIOGRAPHY 



1907. Keeble, F. and Gamble, F. W. The Origin and Nature of 

 the Green Cells of Convoluta roscoffensis. Q. J. M. S. LI. 

 Part 2. 1907. 



1908. Keeble, F. The Yellow-brown cells of Convoluta paradoxa. 

 Q. J. M. S. LII. Part 4. 1908. 



1909. Loeb, J. Experimental study of the influence of Environ- 

 ment on Animals. Essay in Darwin and Modern Science. 

 Univ. Press, Cambridge. 



