

SEXUAL 

 ENDOCRINOLOGY OF 



NON-MAMMALIAN VERTEBRATES 



by 



L. H. BRETSCHNEIDER 



and 

 J. J. DUYVENE DE WIT 



in collaboration with 



S. DUDOK DE WIT, B. VAN EGMOND, M. A. GOE- 

 DEWAAGEN, H. HEINTZBERGER, J. VAN lERSEL. 

 CHR. JASKI, E. VAN KOERSVELD, I. KRISTENSEN, 

 J. MELTZER, G. J. VAN OORDT, and C. PELSMA. 



FROM THE LABORATORY FOR GENERAL ZOOLOGY 

 UNIVERSITY OF UTRECHT, NETHERLANDS 



ELSEVIER PUBLISHING COMPANY, INC. 



NEW-YORK ^..-^IM |^^«^ LONDON 

 AMSTERDAM WW BRUSSELS 



1947 



