. Carnegie Institution of Washington publication. . 393 FIGS. 389, 390, 391, 392, 393. Papio langhrldi 0-Oxyhemoglobin. Pleochroism is rather strong; a pale yellowish-red, 6 rather strong scarlet-red, c deep red. Double refraction strong; on basal sections the extinction is symmetrical; on edge views, looking along the ortho-axis, the extinction is 13° from the basal trace in the obtuse angle. The orientation of the elasticity axes is a A a = 13° in the obtuse angle; b=6; c A ^=6° 30', in the obtuse angle. On the base, one brush of an interference figure is seen with traces of the other, the b
. Carnegie Institution of Washington publication. . 393 FIGS. 389, 390, 391, 392, 393. Papio langhrldi 0-Oxyhemoglobin. Pleochroism is rather strong; a pale yellowish-red, 6 rather strong scarlet-red, c deep red. Double refraction strong; on basal sections the extinction is symmetrical; on edge views, looking along the ortho-axis, the extinction is 13° from the basal trace in the obtuse angle. The orientation of the elasticity axes is a A a = 13° in the obtuse angle; b=6; c A ^=6° 30', in the obtuse angle. On the base, one brush of an interference figure is seen with traces of the other, the brushes widely separated. The acute bisectrix of the optic axes is the axis of least elasticity, Bxa =c, and the optical character is positive. The y-oxyhemoglobin, observed in P. babuin, P. sphinx, and P. anubis, did not appear in the preparations from the blood of this species. CHACMA, Papio porcarius. Plates 98 and 99. The specimen was received from the National Zoological Park at Washington, District of Columbia. Slide preparations of the blood were made in the usual way. The crystals formed readily and were not dissolved, but kept in good condition for more than a month, gradually passing by paramorphous change into methemoglobin, but without loss of form or of sharpness of angles. The first crystals to form were the a-oxyhemoglobin plates; these were soon followed by the /3-oxyhemoglobin, which developed into very large crystals and groups, and became the predominant crystal; but the two forms appeared together in the same slide. The third form, y-oxyhemoglobin, seen in some other species of Papio, did not develop in this species. a-Oxyhemoglobin of Papio porcarius. Orthorhombic: Axial ratio not determinable. Forms observed: Macropinacoid (100), brachypinacoid (010), base (001). Angles: The angles between the pinacoids were measured and gave 90° in each case. Habit tabular, or long or short prismatic; the crystal consisting of the three pina- coids only. Small crystals
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