INTRODUCTION 19 



Novy, F. G. and MacNeal, W. J.: (1905) On the trypanosomes of 



birds. J. Inf. Dis., 2:256. 

 Pasteur, L. : (1870) Etudes sur la maladie des vers a soie. Paris. 

 Perty, M.: (1852) Zur Kenntnis kleinster Lebensformen, etc. Bern. 

 Rosel von Rosenhof, A. J.: (1755) Der kleine Proteus. Der 



Monat.-herausgeg. Insect. -Belust., 3:622. 

 Ross, R.: (1898) Report on the cultivation of Proteosoma Labbe in 



grey mosquitoes. Gov. Print. Calcutta. 

 (1898a) Preliminary report on the infection of birds with 



Proteosoma by the bites of mosquitoes. Ibid. 

 Russell, E. J. and Hutchinson, H. B.: (1909) The effect of partial 



sterilization of soil on the production of plant food. J. Agr. Sc, 



3:111. 

 Schaudinn, F. and Siedlecki, M.: (1897) Beitrage zur Kenntnis 



der Coccidien. Verhandl. deut. zool. Ges., p. 192. 

 Siebold, C. T. v.: (1845) Bericht ueber die Leistungen in der Na- 



turgeschichte der Wiirmer, etc. Arch. Naturg., 11:256. 

 Siedlecki, M.: (1898) Etude cytologique et cycle evolutif de la coc- 



cidie de la seiche. Ann. Inst. Pasteur, 12:799. 



Etude cytologique et cycle evolutif de Adelea ovata 



Schneider. Ibid., 13:169. 



Smith, T. and Kilborne, F. L. : (1893) Investigations into the na- 

 ture, causation, and prevention of Texas or southern cattle 

 fever. Bull. Bur. Animal Ind., U. S. Dep. Agr., No. 1. 



Sonneborn, T. M. : (1937) Sex, sex inheritance and sex determina- 

 tion in Paramecium aurelia. Proc. Nat. Acad. Sc, 23:378. 



(1938) Mating types in Paramecium aurelia, etc. Proc. Am. 



Phil. Soc, 79:411. 



Stein, S. F. N. v.: (1854) Die Infusionsthiere auf ihre Entwickel- 

 ungsgeschichte untersucht. Leipzig. 



(1859-83) Der Organismus der Infusionsthiere. Leipzig. 



Stokes, A. C: (1888) A preliminary contribution toward a history 

 of the fresh-water Infusoria of the United States. J. Trenton 

 Nat. Hist. Soc, 1:71. 



Trembley, A.: (1744) Observations upon several newly discovered 

 species of freshwater polypi. Phil. Trans., 43:169. 



Valentin: (1841) Ueber ein Entozoon im Blute von Salmo fario. 

 Arch. Anat. Phys. wiss. Med., p. 435. 



Woodruff, L. L. : (1937) Louis Joblot and the Protozoa. Sc 

 Monthly, 44:41. 



(1939) Some pioneers in microscopy, with special reference 



to protozoology. Tr. N. Y. Acad. Sc, Ser. 2, 1:74. 



Wrisberg, H. A.: (1765) Observationum de Animalculis infusoriis 

 Satura. Gottingen. 



