OF THE LEMURS, BABOONS, AND MAN. 



311 



GUINEA BABOON, Papio sphinx. Plate 97. 



The specimen was received from the National Zoological Park at 

 Washington, District of Columbia, and was largely clotted. The blood 

 was rubbed in sand with addition of ether. The ground mass was centri- 

 fugalized, obtaining a clear solution from which the slide preparations were 

 made. Crystals of a-oxyhemoglobin formed at first; but were soon dis- 

 solved and replaced by crystals of /3-oxyhemoglobin ; and these in turn 

 finally gave place (in part) to y-oxyhemoglobin ; these three corresponding 

 to the three kinds of oxyhemoglobin observed in other species of baboons. 

 Unfortunately, only the y-oxyhemoglobin was photographed, and the a-oxy- 

 hemoglobin, which disappeared soon after it was formed, was not fully 

 examined crystallographically. The other modifications were fully exam- 

 ined, and quite complete data obtained in regard to them. 



379 



Fio. 379. Papio iphinx < 

 hemoglobin. 



Oiy- 



a-Oxy hemoglobin of Papio sphinx. 



Orthorhombic : no axial ratio determinable from the crystals. 



Forms observed: Macropinacoid (100), brachypinacoid 

 (010), base (001). 



Angles: The angles of the pinacoids, taken over the pina- 

 coid edges, measured 90 in each case. 



Habit square tabular to almost cubic (text figure 379), 

 generally relatively thick tabular crystals. As the optical char- 

 acters were not obtained, the principal plane in the tabular crystal can not be determined 

 for comparison with other species of baboons. The crystals occurred singly and appeared 

 along the protein ring, as well as through the body of the slides. They were dissolved 

 as the /3-oxyhemoglobin crystals formed, and did not persist until the optical characters 

 could be determined. They were, however, pleochroic; and probably corresponded closely 

 to this type of crystal as seen in the long-armed baboon and the chacma. 



^-Oxyhemoglobin of Papio sphinx. 



Monoclinic: Axial ratio a : b : 6 =1.84 18 :!:<!; /? = about 70, but not measured 

 exactly. 



Forms observed: Unit prism (110), base (001). 



Angles: Prism angle, traces of the prism on base, edges 110-001 A 110-001=57 

 actual angle. The angle /? was only approximately determined as about 70. 



Fios. 380, 381, 382, 383. 384. Papio tpMnx /3-Oxyhemoglobin. 



Habit tabular on the base; the crystal consisting of the unit prism cut by the base 

 (text figures 380 and 381). Some more prismatic crystals were observed, and these 

 showed the habit of developing on one pair of prismatic planes until they became tabular 

 in that respect. In the normal crystals tabular on the base, the length of the prism, as 

 compared with its long diagonal, showed a ratio of about 1 : 5. Twinning is common, 



