MINERALOGICAL STRUCTURE N.E. LIZARD DISTRICT. 



Plate A. 



Fig. 1. — Enstatite and Olivine, Serpentine Fig. 2. — Felspar much altered, and Horn- 



after Olivine. South of Coverack. blende after Augite. Coverack. 



Scale 20 diameters. Polarized light. 



1. CLABK, A. M.S., TRURO. 



Fig. 3. — Augite, Felspar, and Olivine very Fig. 4. — Olivine and Felspar changing into 



fresh. Coverack. Hornblende. Coverack. 



