DESCRIPTION OF PLATES. 



PLATE I. 



Fig. 1. Amphibolite, No. 629, Cape Denison, showing mainly hornblende and felspar. 

 Sphene with included magnetite can be seen near the centre. Mag. 35 diam. 



Fig. 2. Biotite amphibolite, No. 412, Cape Denison, showing biotite and hornblende 

 in nearly equal proportions. Mag. 35 diam. 



Fig. 3. Epidote biotite schist, No. 153, Cape Denison, showing biotite, epidote, 

 and felspar. Sphene with included magnetite can be seen in the centre, with a crystal 

 of hornblende a little to the left of it. Mag. 35 diam. 



Fig. 4. Lawsonite amphibolite, No. 635, Cape Denison. Hornblende is the most 

 abundant mineral and the felspar is cloudy with saussuritisation. Biotite and lawsonite 

 are intergrown and the lobate outline of the latter can be distinguished. Mag. 35 diam. 



Fig. 5. Amphibolite, No. 628-6, with a vein of lawsonite, Cape Denison. The 

 walls of the vein are lined with epidote. Mag. 35 diam. 



Fig. 6. Lawsonite amphibolite, No. 720, Cape Denison. Hornblende is the most 

 abundant constituent and the felspar is cloudy. The lawsonite is colourless, with good 

 cleavage, and in large crystals, and it may be seen bending against the hornblende and 

 extending across the field. Mag. 35 diam. 



PLATE II. 



Fig. 1. The junction of a meta-xenolith of gneiss with the amphibolite, Cape 

 Denison. The xenolith, the colourless portion, consists of a granular aggregate of quartz 

 and felspar. Mag. 35 diam. 



Fig. 2. The same field as the preceding, in polarised light, and the granulitic aggre- 

 gate of quartz and felspar forming the xenolith is apparent. Mag. 35 diam. 



Fig. 3. A large relic crystal of quartz in a meta-xenolith of gneiss. The early stages 

 of the granulitisation can be seen at the extremity of the large crystal. X nicols. Mag. 

 45 diam. 



Fig. 4. The junction of a meta-xenolith of saussurite with the amphibolite. The 

 boundary of the primary felspar has been preserved in this example. Large crystals 

 of epidote are set in the saussuritic aggregate. Mag. 35 diam. 



