LITEKATURE 221 



PARKER, G. H. 1896. The Reactions of Metridium to Food and Other 



Substances. Bull. Mus. Comp. Zool Harvard College, vol. 29, pp. 



107-119. 

 PARKER, G. H. 1905 a. The Reversal of Ciliary Movements in Meta- 



zoans. Amer. Jour. Pliysiol., vol. 13, pp. 1-16. 

 PARKER, G. H., 1905 b. The Movements of the Swimming-plates in 



Ctenophores, with Reference to the..Theories of Ciliary Metachron- 



ism. Jour. Exp. Zool., vol. 2, pprl6T7-423. 



PARKER, G. H. 1909. The Origin of the Nervous System and Its Ap- 

 propriation of Effectors. Pop. Sci. Mo., vol. 75, pp. 56-64, 137- 



146, 253-263, 338-345. 



PARKER, G. H. 1910 a. The Reactions of Sponges, with a Considera- 

 tion of the Origin of the Nervous System. Jour. Exp. Zool. vol. 8, 



pp. 1-41. 



PARKER, G. H. 1910 6. The Phylogenetic Origin of the Nervous Sys- 

 tem. Anat. Bee., vol. 4, pp. 51-58. 

 PARKER, G. H. 1911. The Origin and Significance of the Pi-imitive 



Nervous System. Proc. Amer. Philos. Soc., vol. 50, pp. 217-225. 

 PARKER, G. H. 1912. Nervous and Non-nervous Responses of Actin- 



ians. Science, vol. 35, pp. 461-462. 

 PARKER, G. H. 1914 a. Biology and Social Problems. Boston and 



New York, 8vo, xx + 130 pp., 4 pis. 

 PARKER, G. H. 1914" &. The Origin and Evolution of the Nervous 



System. Pop. Sci. Mo., vol. 84, pp. 118-127. Also The Harvey 



Lectures, 1913-1914, pp. 72-84. 

 PARKER, G. H. 1914 c. On the Strength and the Volume of Water 



Currents Produced by Sponges. Jour. Exp. .Zool., vol. 16, pp. 



443^46. 

 PARKER, G. H. 1916 a. The Effector Systems of Actinians. Jour. Exp. 



Zool, vol. 21, pp. 461-484. 

 PARKER, G. H. 1916 6. The Sources of Nervous Activity. Bull. 



Scripps Inst., No. 1, pp. 11-18. Also Science, 1917, vol. 45, pp. 



619-626. 

 PARKER, G. H. 1917 a. Nervous Transmission in the Actinians. Jour. 



Exp. Zool, vol. 22, pp. 87-94. 

 PARKER, G. H. 1917 b. The Movements of the Tentacles in Actinians. 



Jour. Exp. Zool, vol. 22, pp. 95-110. 

 PARKER, G. H. 1917 c. Pedal Locomotion in Actinians. Jour. Exp. 



Zool, vol. 22, pp. 111-124. 

 PARKER, G. H. 1917 d: Actinian Behavior. Jour. Exp. Zool., vol. 22, 



pp. 193-229. 

 PARKER, G. H. 1917 e. The Activities of Corymorpha. Jour. Exp. 



Zool, vol. 24, pp. 303-331. 



