162 KANSAS UNIVERSITY QUARTERLY. 



11. Cerussite. Six-rayed stellate twins are not uncommon ; occurs 

 as a pseudomorph after galena. 



12. Chalcopyrite. Rather common, but never in large quantities. 

 Almost invariably exists as crystals of the tetragonal sphenoid, with 

 a tetrahedrid aspect. 



13. ChrysoeolIa.fX 



14. Copiapite.fX 



15. Covellite.\X 



16. Cuprite.\X 



17. Dolomite. As white or pink rhombohedral crystals with the 

 characteristic curved faces. Very common at Joplin ; much less so 

 at Galena. 



18. Galena. Lamellar twinning is very common in the galena (jf 

 the district. The twinning planes are several vicinal trigonal trisoc- 

 tahedra with high indices, near the rhombic dodecahedron in posi- 

 tion. 



19. Goslar'tte. Occurs as a white fibrous product resulting from 

 the oxidation of the white amorphous zinc sulfid, found on the Moll 

 tract at Galena. 



var. Ferrogoslariie. Described by H. A. Wheeler, from Webl) 

 City, as a brown stalactitic incrustation in abandoned zinc mines. 

 Contains 4.9 per cent. FeSOi. 



var. Cuprogoslav'itc. Described by the writer* from Galena, 

 where it occurs as a light greenish-blue incrustation, associated with 

 sphalerite and chalcopyrite, by the oxidation of which it was doubt- 

 less produced. Contains 12.48 per cent. CuS04. 



20. Gi'cenockife. A greenish-yellow coating on sphalerite. Very 

 rare. 



21. Gypsum. ■\ 



22. Hematiie.j 



23. Hydroz'uicitc. A white amorphus incrustation, associated 

 with calamine and smithsonite, often as a thin layer between the two. 

 Found at Granby, 



24. KaollnHe.^ 



25. LeadhiJUfe. Fully described by Pirsson and Wells** as pair 

 green monoclinic crystals with hexagonal aspect, from the "Beer 

 Cellar" mine at Granby. Also pseudomorphous after calcite and 

 galena. 



26. L'unoniic. This mineral occurs pseudomorphous after pyritf, 

 marcasite, and chalcopyrite. 



27. Linarite.W 



28. Malachite. Rather common throughout the district. 



*This journal, vol. VIII, pp. 105, 106, 1899. 

 **Amer. Journ. Sci., vol. XLVIII (J), p. 219, 1894. 



