PLATE 31 



I8I 



131, 182. Oxyhemoglobin of the Hippopotamus (Hip/n>]M>tamitii iitii/iliibiiix), showing groups of large 

 twinned crystals. 



183. Same, showing single large twinned group of horse-t \ pi- twin. 



184. Same, showing twin aggregates ami ladder-like form produced by twinning. 



18S, 186. Oxyhemoglobin of the Peccary (l)/i-nli/l<:t Inliinliix}. showing dodecahedron-like romliination of 

 short diametral prism with unit pyramid. 



