THE CONTRACTILE VACUOLE 445 



Hall, R. P., and F. W. Dunihue. 1931. On the vacuome and food vacuoles 

 in VortJcella. Trans. Amer. micr. Soc, 50: 196-205. 



Hance, R. T, 1917. Studies on a race of Paramecium possessing extra con- 

 tractile vacuoles. J. exp. Zool., 23: 287-333. 



Hartog, M. M. 1888. Preliminary notes on the functions and homologies of 

 the contractile vacuole in plants and animals. Rep. Brit. Assoc. Adv. Sci., 

 Bath, pp. 714-16. 



Harvey, E. B. 1917. A physiological study of specific gravity and of lumines- 

 cence in Noctiluca, with special reference to anesthesia. Pap. Tortugas 

 Lab., 11: 237-53. 



Haye, Ans. 1930. Uber den Exkretionsapparat bei den Protisten, nebst Be- 

 merkungen iiber einige andere feinere Strukturverhiiltnisse untersuchten 

 Arten. Arch. Protistenk., 70: 1-86. 



Herfs, A. 1922. Die pulsierende Vakuole der Protozoen, ein Schutzorgan 

 gegen Aussussung. Arch. Protistenk., 44: 227-60. 



Hirschler, J. 1924. Sur une Methode de Noircissment de I'Appareil de Golgi. 

 C. R. Soc. Biol. Paris, 90: 893. 



1927. Studien iiber die sich mit Osmium schwarzenden Plasmakom- 



ponenten einiger Protozoenarten. Z. Zellforsch., 5 : 704-86. 



Hopkins, D. L. 1938. Adjustment of the marine amoeba, Flabellula m'lra 



Schaeffer, to changes in the total salt concentration of the outside medium. 



Biol. Bull., 75: 337 (Abstr.). 

 Howland, R. B. 1924a. Experiments on the contractile vacuole of Amoeba 



verrucosa and Paramecium caudatum. J. exp. Zool., 40: 251-62. 

 1924b. On excretion of nitrogenous waste as a function of the contractile 



vacuole. J. exp. Zool., 40: 231-50. 

 Howland, R. B., and H. Pollack. 1927. Expulsion of injected solute by the 



contractile vacuole of Amoeba. Proc. Soc. exp. Biol. N.Y., 25: 221-22. 

 Hyman, Libbie H. 1936. Observations on Protozoa: The impermanence of 



the contractile vacuole in Amoeba verspertilio. Quart. J. micr. Sci., 79: 



43-56. 

 Jennings, H. S. 1904. A method of demonstrating the external discharge of 



the contractile vacuole. Zool. Anz., 27: 656-58. 

 Kent, W. S. 1880. A Manual of the Infusoria. London. 

 Khainsky, A. 1910. Zur Morphologie und Physiologie einiger Infusorien 



{Paramecium caudatum^ auf Grund einer neuen histologischen Methode. 



Arch. Protistenk., 21: 1-60. 

 King, R. L. 1928. The contractile vacuole in Paramecium trichium. Biol. Bull., 



55: 59-69. 



1933. Contractile vacuole of Euplotes. Trans. Amer. micr. Soc, 52: 



103-6. 



1935. The contractile vacuole of Paramecium multimicronucleata. J. 



Morph., 58: 555-71. 



