Fig. 47. 



Fig. 46. 



Fig. 48. 



Fig. 49. 



Fig. 47, magnification, 12 x . Fig. 48, magnification, 220 x . Fig. 49, magnification, 72 x . 

 Figs. 47 and 48, etched with ammonia and hydrogen peroxide, followed by acidified feme 

 chloride. Fig. 49, etched with ammonia and hydrogen peroxide. 



