BIOGRAPHICAL NOTES ON AUTHORS 



G. Ladd Prosser obtained his B.A. at the University of 

 Rochester in 19 29, his Ph.D. at the Johns Hopkins University 

 Zoology Department in 1932, and now holds the title of Professor 

 of Physiology, University of Illinois. He has performed outstanding 

 work in the fieldsofphysiology of nervous systems of invertebrates, 

 comparative pharmacology of hearts, conduction in non-striated 

 muscles, and physiological adaotation: (1) mechanisms and (2) role 

 in evolution. The text. Comparative Animal Physiology, edited 

 by Prosser, et al., needs no introduction. 



William R. Dawson received his Ph.D. from Stanford, Depart- 

 ment of Zoology, in 1953, and is now assistant professor in the 

 Department of Zoology at the University of Michigan. He has worked 

 on temperature regulation and water balance of birds and reptiles, 

 reptile metabolism, and avian paleontology. 



Kjell Johansen has the degree Gand. Real, from Oslo, Norway. 

 He has worked with many kinds of vertebrates and higher inverte- 

 brates. He is concerned with physiological phylogeny, and compara- 

 tive cardiovascular physiology. He is now atthe University of Oslo, 

 Institute for Experimental Medical Research. 



Laurence Irving received the degree of A.B. at Bowdoin in 

 1916, the A.M. from Harvard in 1917, and the Ph.D. from Stanford 

 in 19 25. He has been awarded honorary degrees also: an honorary 

 M.D. from Oslo in 1956 and an honorary D.Sc. from Bowdoin in 

 1959. His long and productive list of research accomplishments 

 include work in diverse fields such as adaptations to cold in mam- 

 mals and birds, migrations of Alaskan birds, and respiratory 

 exchange in diving mammals. He has elucidated the principle of 

 peripheral heterothermy. 



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