PLATE 54 



fi 



324 



. 



322. 



323, 324. 



o-Oxyhemoglobin of the Norway Rut (M us norn iiim.-.), showing symmetrical and flattened 

 prisms and hexagonal plates produced by shortening of prism. Star-shaped twin on unit 

 pyramid seen at two places in lower part of h'eld. 



Same, showing especially nearly hexagonal plates produced l>y shortening of llattrned prism. 



0-Oxyhemoglobin of the Norway Rat, showing symmetrical and flattened octahedra in dillVrent 

 a-pects. with higher magnification. 



-( Ixyhemoglobin of the Norway Rat. showing symmetrical and unsymmetrifal prismatic crystals 

 and pseudo-hexagonal jilates, with some hexagonal plates of /3-oxyhemoglobin due to flat ten- 

 ing of octahedron. 



Oxyhemoglohin of Black Rat (Max rtittux), showing flattened prism terminated liy dome, \\ilh 

 dome faces sometimes unequally developed and producing four-, live-, and six-sided plairs. 



