BIBLIOGRAPHY 



Ahrens, L. H. (1956) Radioactive methods for determining geological 



age. Rep. Progr. Phys. 19; 80. 

 Amano, S. (1957) Structure of Centrioles and spindle body as observed 



under electron and phase contrast microscope; a new extension fibre 



theory concerning mitotic mechanisms in animal cells. Cytologia. 



22; 193. 

 Baker, J. R. (1948) The status of the Protozoa. Nature, Lond. 161; 



548 and 587. 

 Baldwin, E. (1940) An Introduction to Comparative Biochemistry. 



Cambridge University Press. 

 Baldwin, E. (1957) The Dynamic Aspects of Biochemistry. 3rd edition. 



Cambridge University Press. 

 Baldwin, E., and Needham, D. M. (1937) A contribution to the com- 

 parative biochemistry of muscular and electrical tissues. Proc. roy. 



Soc. B122; 197. 

 Baldwin, E., and Yudkin, W. H. (1948) Phosphagen in annelids 



(Polychaeta). Biol. Bull. 95; 273. 

 Baldwin, E., and Yudkin, W. H. (1949) The annelid phosphagen with a 



note on phosphagen in Echinodermata and Protochordata. Proc. roy. 



Soc. B136; 614. 

 Balfour, F. M. (1880) Comparative Embryology. Macmillan, London. 

 Beatty, I. M., Margrath, D. I., and Ennor, A. H. (1959) Biochemistry 



of Lombricine. Nature, Lond. 183; 591. 

 de Beer, G. (1954) The evolution of the Metazoa. In Evolution as a 



Process. (Edited by Huxley, J., Hardy, A. C, and Ford, E. B.) 



p. 24. Allen and Unwin, London, 

 de Beer, G. (1958) Embryos and Ancestors (3rd Ed.). Oxford University 



Press, 

 van Beneden, E. (1876) Recherches sur les dicyemides, survivants 



actuels d'un embranchement de mesozoaires. Bull. Acad. Belg. CI. Sci. 



2ndser. 41; 1160; 42; 35. 

 Bergman, W. (1944) The sterols of starfish. J. org. Chem. 9; 281. 

 Bergman, W. (1949) Comparative biochemical studies of the lipids of 



marine invertebrates with special reference to the sterols. J. Mar. Res. 



8; 137. 

 Bergman, W., and Low, E. M. (1947) Remarks concerning the structure 



of sterols from marine invertebrates. J. org. Chem. 12; 67. 



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