PLATE 69 



$ 'J, 



A-- -v\ 



S 





409 



410 



- - -- 



\ 



412 



, am, ? -i i ' 

 1^ SH, 



414 



40!l. Oxyhemoglobin of the Black Bear (L'rsus omericanus), showing small. livst-i'iinniMl crystals in 

 trilliiiKs, the bear-type twin. 



410. Same, lar^f, single crystals slio\vin<; jiarallcl growth. Combination is liasc cut at one eml of 



orthii-axis by unit i>rism aiul at opposite end by unit pyramiil. 



411. Same, showing larger crystals in same combination as 411) with clinopinacoid cutting unit pyramiil 



at one end of axis. Small section of crystals above, to the right slums hrminiorphic form. 



412. Same, showing crystals in various orientations and in section. 



413, 414. Same, showing aggregation of crystals in parallel growths and radiating groups along cover edge. 



