Trans. N.Z. Inst., 7ol. LIII. 



Plate XLI. 



Fig. 1. — Mine of X. perissopa. Camera lucida ; transmitted light ; slightly diagram 



matic ; enlarged. 



Fig. 2. — Portion of early part of gallery of A 7 , perissopa, to show character of frass- 

 deposition. Camera lucida ; diagrammatic ; greatly enlarged. 



