170 PROTOZOOLOGY 



1937 Formation, inheritance and variation of the teeth 



in Difflugia corona. Jour. Exp. ZooL, Vol. 77. 

 JoLLOS, V, 1934 Dauermodifikationen und Mutationen bei 



Protozoen. Arch. f. Protistenk., Vol. 83. 

 Hegner, R. W. 1919 Heredity, variation, and the appearance 



of diversities during the vegetative reproduction of Arcella 



dentata. Genetics, Vol. 4. 

 MacDougall, M. S. 1929 Modifications in Chilodon uncinatus 



produced by ultraviolet radiations. Jour. Exp. Zool.,Vol. 54. 

 1931 Another mutation of Chilodon uncinatus produced 



by ultra-violet radiation, with a description of its maturation 



process. Ibid., Vol. 58. 

 Pascher, a. 1916 Ueber die Kreuzung einzelliger, haploider 



Organismenl Chalmydomonas. Ber. deutsch. Bot. Ges. 



Vol. 34. 

 - — 1918 Ueber die Beziehung der Reduktionsteilung zur 



Mendelschen Spaltung. Ibid., Vol. 36. 

 Reynolds, B. D. 1923 Inheritance of double characteristics in 



Arcella polypora Penard. Genetics, Vol. 8. 

 — 1924 Interactions of protoplasmic masses in relation to 



the study of heredity and environment in Arcella polypora. 



Biol. Bull., Vol. 46. 

 Root, F. M. 1918 Inheritance in the asexual reproduction in 



Centropyxis aculeata. Genetics, Vol. 3. 

 SoNNEBORN, T. M. and R. S. Lynch 1934 Hybridization and 



segregation in Paramecium aurelia. Jour. Exp. Zool.,Vol. 67, 

 Strehlow, K. 1929 Ueber die Sexualitat einiger Volvocales. 



Zeitschr. Botanik, Vol. 21. 

 Taliaferro, W. H. 1926 Variability and inheritance of size in 



Trypanosoma lewisi. Jour. Exp. Zool., Vol. 43. 



