66 ECOLOGY AND LIFE HISTORY OF THE COMMON FROG 



massive attack on tadpoles of R. p. pretiosa by leeches, so that this 

 predator must be considered seriously, although I have never seen any 

 such attacks myself. 



In this chapter, I cannot deal with the w^hole question of the mortaUty 

 of the species, adults and tadpoles together, but must defer many 

 questions on the relations between abundance and Hmiting factors 

 until I have described the hves of the adult frogs. 



REFERENCES 



Ameel, D.J. (1938)7. Parasit.y 24, 219-24. 



Blair, W. N. (1927) Proc. zool. Soc. Lond., 2, 999-1002. 



Carpenter, C. C. (1953) Herpetologica, 9, 77-8. 



Gallien, L. (1935) Trav. Sta. zool Wimereux, 12, 1-181. 



JOYEUX, C, Baer, J. G. and Carriere, P. (1934) C.R. Acad. Sci., Paris, 199, 



1067-8. 

 Lack, D. (1954) The Natural Regulation of Animal Numbers (Clarendon Press, 



Oxford). 

 Savage, R. M. (1949) Proc, zool. Soc, Lond., 120, No. i, 15-37. 

 Wenyon, C. M. (1926) Protozoology (Bailliere, Tindall & Cox, London). 

 Zeller, E. (1872) Z. wiss. zool, 22, 1-39. 

 Zeller, E. (1876) Z. wiss. zool, 27, 238-74. 



