FOOD, HIBERNATION AND MIGRATION II9 



Cummins, H. (1920)/. exp. Zool, 30, 325-43. 



CzELOTH, H. (1930) Z. ver^l. Physiol., 13, 74-163. 



DoLK, H. F. and Postma, N. (1927) Z. verj^l. Physiol., 5, 417-44. 



Fatio, V. (1872) Fantie dcs Vcrtehris dc la Suisse (George, Geneva). 



GiBLETT, M. A. (1932) Geophysical Memoir, 54 (Meteorological Office, London). 



Hecht, G. (1930) S.B. Ges. naturf. Fr. Bcri, 16 December, 316. 



Heron-Royer (1885) Bull. Soc. Etud. Sci. Angers, 92-134. 



JuszczYK, W. (195 1) Bull. Int. Acad. Cracovie [Acad. pol. Sci.) 2, 341-69. 



Mailles, C. (1881) Bull. soc. zool. Fr., 6, 231. 



Martof, B. (1953) Ecology, 34, No. i, 165-74, 529-43. 



Moore, H.J. (1954) Brit.]. Herpet., i, No. 11, 194-244. 



Neal, R. R. C. (1956) Brit. J. Herpet., 2, No. 2, 15-23. 



Noble, G. K. (193 1) The Biology of the Amphibia (McGraw-Hill, New York). 



Parker, E. (1934) Observer, London, 4 March. 



RovzEWSKA, L (1934) Observer, London, 11 March. 



Savage, R. M. (1935) Proc. zool. Soc. Lond., 49-98. 



Smith, C. L. (1949)7. Exp. Biol. 26, 412-29. 



Smith, M. A. (195 1) The British Reptiles and Amphibians (Collins, London). 



Veryard, R. G. (1935) Not seen, Ref. Nature, Lond., 13 July. 



WOLTERSTORFF, W. (19O4) Zool AnZ., 28, 536-8. 



