PLATEiyi. 



Fig. 1. Micro-structure of aerolite from Simbirsk, Partsch, Russia. Magnified 13 

 diameters. The mass is made up of numerous chondri between 1 and 2 

 millimeters in diameter, which have a more or less circular outline and 

 vary in structure from fibrous to coarse, granular. One chondrus made up 

 of fibrous enstatite exhibits the peculiar, eccentric fan-shape which chara- 

 cterizes these chondri. The coarse grains are principally chrysolite. 



Fig. 2. Single chondrus from the Clarac, Haute Garonne, France, aerolite, magnified 

 46 diameters. The mass of the chondrus is made up of lath-shaped in- 

 dividuals of pyroxene. It is enclosed in a shell of metallic grains which 

 can be seen to give its border a distinct outline and separate it from the 

 ground mass. 



