PLATE 2 



Oxyhemoglobin from a fish (carp). Oxyhemoglobin from an amphibian 



(necturus). 



Oxyhemoglobin from a reptile Oxyhemoglobin from a bird (goose), 

 (python). 



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/ I^f **t3i.*P 



Oxyhemoglobin from a mammal Oxyhemoglobin from a mammal 

 (dog). (guinea-pig). 



Plate showing the different Oxyhemoglobin crystals from different 

 classes of vertebrates. (From photographs kindly given the author by 

 Prof. Edward T. Reichert.) 



