230 Regulation of Size in Unicellular Organisms 



ture of Paramecium aurelia at Yale University. Proc. Nat. Acad. 

 Sci., 7, 41-44. 



Woodruff, L. L. 1925 The physiological significance of conjugation 

 and endomixis in the infusoria. Amer. Nat., 59, 225-249. 



Woodruff, L. L. 1928 Further studies on the life history of Blephar- 

 isma undulans. Proc. Soc. Exp. Biol. Med., 25, 683-684. 



Woodruff, L. L. 1929 Thirteen thousand generations of Parame- 

 cium. Proc. Soc. Exp. Biol. Med., 26, 707-708. 



Woodruff, L. L., and Baitsell, G. A. 1911 The temperature co- 

 efficient of the rate of reproduction of Paramecium aurelia. Amer. 

 Jour. Physiol., 29, 147-155. 



Woodruff, L. L., and Erdmann, R. 1914 A normal periodic reor- 

 ganization process without cell fusion in Paramecium. Jour. Exp. 

 Zool., 17, 425-516. 



Yocom, H. B. 1928 The effect of the quantity of culture medium on 

 the division rate of Oxytricha. Biol. Bull., 54, 410-416. 



Young, D. B. 1922 A contribution to the morphology and physiology 

 of the genus Uronychia. Jour. Exp. Zool., 36, 353-395. 



Young, R. T. 1917 Experimental induction of endomixis in Para- 

 mecium aurelia. Jour. Exp. Zool., 24, 35-53. 



Young, R. T. 1918 The relation of rhythms and endomixis: their 

 periodicity and synchronism in Paramecium aurelia. Biol. Bull., 

 35, 38-48. 



Zoethout, W. D. 1899 On some analogies between the physiological 

 effects of high temperature, lack of oxygen, and certain poisons. 

 Amer. Jour. Physiol., 2, 220-242. 



Zweibaum, J. 1912 Laconjugaisonetladifferenciationsexuellechez 

 les Infusoires. V. Les conditions necessaires et suffisantes pour la 

 conjugaison du Paramsecium caudatum. Arch. Prot., 26, 275-393. 



Zweibaum, J. 1922 Richerche sperimentali sulla coniugazione degli 

 Infusori. I. Influenza della coniugazione sull' assorbimento dell' 

 2 nel Paramsecium caudatum. Arch. Prot., 44, 99-114. 



Zuelzer, M. 1904 Beitrage zur Kenntnis von Difflugia urceolata 

 Carter. Arch. Prot., 4, 240-295. 



