ORDER XI. GENERA AND SPECIES. 



1. HEXAHEDRAL. Tessular. 



Cleavage, traces of the dodecahedron. 

 Malleable. 



Hexahcdral Silver -Glance. J. iii. 11. 



III. LEAD-GLANCE. Tessular. 



Colour pure lead-grey. 



H. = 2-5. 



G. = 7-4 ... 7'6. 



1. HEXAHEDRAL. Tessular. 



Cleavage, hexahedron, perfect. 



Hexahedral Gakna or Lead-Glance. J. iii. 13. 



IV. TELLURIUM-GLANCE. Prismatic. 



Colour blackish lead-grey. 

 Cleavage monotomous, perfect. 

 H. = 1-0 ... 1-5. 

 G. = 7-0 ... 7-1. 



1. PRIS3IATIC. Prismatic. 



Cleavage, axotomous or prismatoidal. 



Prismatic Tellurium-Glance. J. iii. 16. 



V. MOLYBDENA-GLANCE. Rhombohedral. 



Colour pure lead-grey. 

 Thin laminae very flexible. 

 H. = 1-0 ... 1-5. 

 G. = 4-4 ... 4-6. 



1. RHOMBOHEDRAL. Di-rhombohedral. 

 Cleavage, R co, perfect. 



Rhomboidal Molybdcna. J. iii. 18. 



VI. BISMUTH-GLANCE. Prismatic. 



Colour pure lead- grey. 



