i8 The West Avierican Scientist. 



ing- of the fauna and flora not only of the past, but lor the present 

 also.— (T. D. A. C.) 



VII. FIRST CONTRIBUTIONS TOWARDS A LIST OF THE MIN- 

 ERALS OF WET MOUNTAIN VALLEY. 



(Read before the Colorado Biological Association.) 



I. Sphalerite — Zinc Blende. Bassick mine; Bull Domingo 

 mine. 



^2. Cerussite — Carbonate of Lead. Use mine; Silver Lance, in 

 small quantity. 



3. Galena — Suli)hide of Lead. Bull Domingo; Jay Gould 

 mine. 



4. Anglesite — Sulphate of Lead. Thomas and Lawrence 

 mine. 



5. Tetrahedriie — Gray Copper. Humboldt mine; Pocahon- 

 tas mine. Zoo mine; Silver King mine; Micawber mine. 



6. Bornite. Gem mine. 



7. Azurite — Blue Carbonate of Copper. Zoo mine; Mark- 

 heart's mine; Greenhorn Range. 



8. Malachite — Green Carbonate of Copper. Zoo mine; 

 Markheart's mine. 



9. Cuprite — Oxide of Copper. Markheart's mine. 



10. Chalcopyrite — Copper Pyrites. Bayard Taylor mine; 

 Sangre de Cristo Range. 



II. Cuprum — Native Copper. Sangre de Cristo Range, 

 many places. 



12. Chalcocite — Copper Glance. Sangre de Cristo Range. 



13. Cerargvrite — Horn Silver. On the porphyry belt. 



14. Bromyrite — Bromide of Silver. On the porphyry belt. 



15. lodyrite— Iodide of Silver. On the porphyry belt. 



16. Argentum — Native Silver. Bull Domingo mine; Gem 

 mine. 



17. Stephanite — Sulphide of Silver, Humboldt mine; Poca- 

 hontas mine. 



18. Molybdenite— Sulphide of Molybdenum. Hailstorm mine. 

 Grape Creek. 



19. Pyrargyrith — Ruby Silver. Humboldt mine. 



20. .Sylvanite — Telluride of Silver. Povvhattan mine, Rosita. 



21. Baryta — Sulphate of Barium. Pocahontas mine; Silver 

 Bar. 



22. Calcite — Carbonate of Lime. Sangre de Cristo Range. 



23. Niccolite — Arsenate of Nickel. Gem mine. 



24. Asbolite — Earthy Cobalt. Gem mine. 



25. Psilomelane — Black Oxide of Manganese. Almost every- 

 where, especially on porphyry belt. 



26. Magnetite — Oxide of Iron. Near Gem mine; Grape 

 Creek. 



27. Pyrite — Iron Pyrites. Gray Eagle Mountain Vein; Im- 

 mortal mine; Iron Mountain. 



