216 PROTOZOOLOGY 



(1950b) IV. Ibid., 87:317. 



(1950c) V. Ibid., 87:349. 



(1951) VI. Ibid., 88:199. 



(1951a) VII. Ibid., 88:385. 



Hall, S. R., Sanders, E. P. and Collier, J.: (1934) The 



wood-feeding roach Cryptocercus, etc. Mem. Am. Acad. Arts & 



Sc., 17:185. 

 Crump, Lettice M.: (1950) The influence of bacterial environment 



on the excystment of amoebae from soil. J. Gen. Microbiol., 4: 



16. 

 Cutler, D. W. and Crump, L. M.: (1935) The effect of bacterial 



products on amoebic growth. Brit. J. Exper. Biol., 12:52. 

 Daniel, G. E. and Chalkley, H. W. : (1932) The influence of tem- 

 perature upon the process of division in Amoeba proteus. J. Cell. 



Comp. Physiol., 2:311. 

 Darby, H. PL: (1929) The effect of the hydrogen-ion concentration 



on the sequence of protozoan forms. Arch. Protist., 65: 1. 

 Dass, C. M. S.: (1950) Chromatin elimination in Glaucoma pyrifor- 



mis. Nature, 165:693. 

 Davis, T. G.: (1941) Morphology and division in Tetratoxum uni- 



fasciculatum. Tr. Am. Micr. Soc, 60:441. 

 Dawson, J. A.: (1919) An experimental study of an amicronucleate 



Oxytricha. I. J. Exper. Zool., 29:473. 

 and Hewitt, D. C: (1931) The longevity of encysted Col- 



poda. Am. Nat., 65:181. 



and Mitchell, W. H.: (1929) The vitality of certain in- 



fusorian cysts. Ibid., 63:476. 



De Garis, C. F.: (1935) Lethal effects of conjugation between 

 Paramecium aurelia and double-monsters of P. caudatum. Am. 

 Nat., 69:87. 



Diller, W. F.: (1936) Nuclear reorganization processes in Para- 

 mecium aurelia, etc. J. Morphol., 59:11. 



(1948) Nuclear behavior of Paramecium trichium during con- 

 jugation. Ibid., 82:1. 



(1950) An extra postzygotic nuclear division in Paramecium 



caudatum. Tr. Am. Micr. Soc, 69:309. 



(1950a) Cytological eivdence for pronuclear interchange in 



Paramecium caudatum. Ibid., 69:317. 

 Dobell, C. : (1908) The structure and life history of Copromonas 



subtilis, etc. Quart. J. Micr. Sc, 52:75. 



(1917) On Oxnerella maritima, etc. Ibid., 62:515. 



(1925) The life history and chromosome cycle of Aggregata 



eberthi. Parasitology, 17:1. 

 (1928) Researches on the intestinal Protozoa of monkeys and 



man. I, II. Ibid., 20:357. 



and Laidlaw, P. P.: (1926) On the cultivation of Entamoeba 



histolytica, etc. Ibid., 18:283. 

 Enriques, P.: (1916) Duemila cinquecento generazioni in un in- 

 fusorio, senza conjugazione ne partenogenesi, ne depressioni. 

 Rev. Acad. Sc. Bologna, 20:67. 



