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

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



5b CHnographic projection of same 



6a Calcite from Lyon Mountain, type IL Orthographic projection 

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



6b Chnographic 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: V (2243), y (8.8.16.3) ^^'^ ^ (°-^9-^9-^3) 



7b CHnographic projection of same 



8a Calcite from Lyon Mountain, type IIL Orthographic projec- 

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

 (0.19.19.13), ^' (2131) and 11; (14. 12. 26. 5) 



8b CHnographic projection of same 



