PLATE 12 



68 





i\ 



7 ^ 



'- 

 70 









4 * 



; 

 '< 





71 , 



67, 68. Oxyhemosloliin of the Quail (Colinus virgininnus), showing same compnsitu tabular erystal in 

 two different stages of development. 



69. Same, showing single and composite tabular crystals. 

 70, 71. Oxyhemoglobin of the Guinea-fowl (Nurnida meleagris), showing small simple crystals. 



72. Same, larger crystals, showing twin on pyramid. 



