PLATE 17 



no' ^Oxyhenioglobin of the Opossum, showing tabular crystals in various orientations. 

 9s. bame, showing large composite crystal. 



99. Same, showing basal aspect of tabular crystals with a crystal of a-oxyhemoglobin in partial orien- 

 tation with it, also edge view of a larger crystal of "the /9-oxyheinoglobin. 

 le ' snowm K single large tabular crystal. 

 01, 102. a-CO-Hemoglobin of the Opossum, showing thin tabular crystals in different aspects. 



