PLATE 27 



? -- 



157 



58 



' 



,61 * 



160 



162 



^^^^^^^^^^v^^ 



157. a-Oxyhemoglobin of the Mule (Equus asinus c? X Equus caballus ?), showing short prismatic 



crystals. 



158. Same, showing long prismatic crystals growing from protein ring. 



.59, 160. Same, showing large stout prismatic crystals growing along cover edge. 



161. /3-Oxyhemoglobin of the Mule, showing equidimensional development of crystals, mostly un- 



twinned. 



162. Same, showing elongated horse-type twins. 



159 



