594 



ME. A. K. COOMAEA-SWAMY ON 



[Aug. 1900, 



appearances are seen. Some of the garnets are surrounded by 

 irregular graphic intergrowths of augite, biotite, magnetite, and 

 plagioclase. The larger grains of magnetite are either included in 

 the larger garnets or in the augite. In the latter case they are 

 almost always separated from the augite by a narrow rim of 

 garnet. 



Kandy. — A very dark pyroxene-granulite from the ' Mica Estate ' 

 at Talatuoya shows traces of a similar structure. In this rock the 

 pyroxene, though pleochroic, appears to be monoclinic. 



Fig. 1. — Corroded garnet (G), associated with brown mica (M) and 

 surrounded by orthoclase-microperthite (F), in pyroxene-granulite ; 

 Magedara ( x 57). See p. 595. 



[It is supposed that the three portions of garnet are remnants of a single 

 individual.] 



Type 2. R age da r a. — In two specimens of pyroxene-granulite 

 associated with graphite-veins, the felspar is almost entirely ortho- 

 clase and the pyroxene is rather scarce, although the rocks are 

 dark. The minerals are quartz, orthoclase-microperthite, garnet, 

 biotite (scarce), hornblende (replacing pyroxene), sphene, magnetite, 



