REFERENCES 393 



HoRSTADius, S. (1950): Transplantation experiments to elucidate inter- 

 actions and regulations within the gradient system of the developing 



sea urchin egg. J. Exptl. Zool. 113, 245-276. 

 Jones, E. E., Jr. (195 1): Encystment, excystment, and the nuclear cycle 



in the ciliate Dileptus anser. J. Elisha Mitchell Sci. Soc. 67, 205-218. 

 Klein, B. M. (1932): Das Ciliensystem in seiner Bedeutung fiir Loko- 



motion, Koordination und Formbildung mit besonderer Beriick- 



sichtigung der Ciliaten. Ergebn. d. Biol. 8, 75-179. 

 Lewin, K. R. (1911-12): The behaviour of the infusorian micronucleus 



in regeneration. Proc. Roy. Soc. {London) B84, 332-344. 

 LiLLiE, F. R. (1906): Observations and experiments concerning the 



elementary phenomena of embryonic development in Chcetopterus. 



y. Exptl. Zool. 3, 153-268. 

 LoEFER, J. B. (1936): Isolation and growth characteristics of the " Zooch- 



lorella " of Paramecium bursaria. Am. Naturalist 70, 184-188. 

 LoRCH, I. Joan and J. F. Danielli (1950) : Transplantation of nuclei from 



cell to cell. Nature 166, 329-330. 

 LoRCH, I. Jo.\N and J. F. Danielli (1953): Nuclear transplantation in 



Amoeba. I. Some species characters of Amoeba proteus and Amoeba 



discoides. Quart. J. Micros. Sci. 94, 445-460. 

 Lucas, Miriam S. (1932) : The cytoplasmic phases of rejuvenescence and 



fission in Cyathodiunium piriforme. II. A type of fission heretofore 



undescribed for ciliates. Arch. Protistenk. 'j'j^ 407-472. 

 Lund, E. E. (1935): The neuromotor system of Oxytricha. jf. Morph. 58, 



257-277- 

 Lund, E. J. (1914): The relations of Bursaria to food. J. Exptl. Zool. 16, 



1-52; 17, 1-39. 

 Lund, E. J. (1917-18): Reversibility of morphogenetic processes in 



Bursaria. J. Exptl. Zool. 24, 1-33. 

 LwoFF, A. (1950): Problems of Morphogenesis in Ciliates. Wiley, New 



York. 

 McDouGALL, W. (1938): The Riddle of Life. Methuen, London. 

 Marsland, D. a. (1943): Quieting Paramecium for the elementary 



student. Science 98, 414. 

 Mast, S. O. (1909): The reactions of Didinium nasutum (Stein) with 



special reference to the feeding habits and functions of the trichocysts. 



Biol. Bull. 16, 91-118. 

 Mazia, D. (1952): Physiology of the cell nucleus. In Modern Trends in 



Physiology and Biochemistry (Edited by E. S. G. Barron), New York, 



pp. 77-122. 

 MoNNE, L. (1948): Functioning of the cytoplasm. Advances in Enzy- 



mology 8, 1-65. 

 Moore, A. R. (1945): The Individual in Simpler Forms. University of 



Oregon Press. 

 MuGARD, Helene (1947): Division et morphogenese chez les Ophryo- 



glenes. C.R, Acad. Sci., Paris 225, 70-72. 



