5a Calcite from Lyon Mountain, type I. Orthographic projection 

 showing forms: M (4041), E (0.13. 13.4) and fx (5491) 



5b Clinographic projection of same 



6a Calcite from Lyon Mountain, type II. Orthographic projection 

 showing forms: Y (0.19. 19. 13) and (\\ (2461) 



6b Clinographic projection of same showing parallel grooving 

 caused by the vicinal development of the forms c (0001) and 

 e (01 1 2) 



7a Calcite from Lyon Mountain, type III representing the simplest 

 expression of the pyramidal habit. Orthographic projection 

 showing forms: r (2243), y (8.8.16.3) and Y (0.19. 19. 13) 



7b Clinographic projection of same 



8a Calcite from Lyon Mountain, type III. Orthographic projec- 

 tion showing forms: r (2243), y (8.8.16.3), I (0445) Y 

 (o. 19. 19. 13), v (2 13 1) and Hi (14. 12. 26. 5) 



8b Clinographic projection of same 



