OF THE CATS AND CIVETS. 



283 



FE.L.1DJE. 



LION, Felis leo. Plates 80, 81, and 82. 



The first of the specimens examined was from a young lion, about 18 

 months old, that had been shot and afterwards killed with chloroform. 

 The specimen was received from the New York Zoological Park. The blood 

 was 24 hours old and had been drawn into oxalate. It was ether-laked and 

 centrifugalized, and from the clear solution the preparations were made. 

 After covering, the blood soon begins to crystallize, but in this preparation 

 only crystals of reduced hemoglobin were obtained. The laked blood 

 crystallized in the test-tube. The second specimen was from the Philadel- 

 phia Zoological Gardens, and was from an adult animal. In this blood, 

 after the usual preparation as outlined above, there appeared at first crys- 

 tals of reduced hemoglobin in the shape of rods or prisms; and later, as a 

 sort of second crop, there appeared two types of crystals of oxyhemoglobin, 

 both evidently with the same axial ratio, but with different development 

 and a different prism. From these oxyhemoglobin crystals, and especially 

 from this latter form, there developed, by paramorphous change, crystals 

 of the metoxyhemoglobin that retained the form of the original oxyhemo- 

 globin. The crystallographic characters did not appear to be influenced 

 by the change from the one to the other material. 



Oxyhemoglobin of Felis leo. 



Orthorhombic: Axial ratio a : b : (5 = 0.765 : 1 : 1.235. 



Forms observed: Unit prism (110), macrodome (101), base (001), macropinacoid 

 (100), brachypinacoid (010). 



Angles: Prism angle 110 A 1TO =74 50' (normals) ; macrodome angle 101 A T01 = 

 63 32'; prism to base 110 A 001 =90, macropinacoid to brachypinacoid 100 A 010 =90. 



322 



FIGS. 317, 318, 319, 320. Felis leo Oxyhemoglobin. FIGS. 321, 322. Felis leo Reduced Hemoglobin. 



The crystals occur in two habits : (a) very thin tabular on the brachypinacoid, in 

 rhombic plates consisting of the brachypinacoid bounded by the macrodome (text figures 

 317 and 318); (b) somewhat thicker, tabular on the basal pinacoid (001), and consisting 

 of this pinacoid in combination with the unit prism (110) and the macropinacoid (100) 

 (text figures 319 and 320). The crystals of type (a) occur scattered through the body 

 of the slide, singly or in groups formed by the piling of the plates one upon another on 

 the brachypinacoid in regular growth; they also occur in irregular, radiating hetero- 

 geneous aggregates. Type (b) crystals occur mainly along the cover edge; they are in 

 groups of regular growth along the brachy and macro-axes, and as single crystals are 

 elongated on the macro-axes. They also aggregate into groups by piling up on the base, 



