^/j.8 trans. st. louis acad. science. 



Ankerite. 



In Phelps Co., in bands in Red Hematite. 



Epsom iTE. 



In the water of several mineral springs, especially in Bates Co. 



CALCIUM. 



Calcite. 



In St. Louts, in cavities of the limestone, in well developed crystals, up 

 to 6 inches long and about 2 inches thick at the base, colorless to light 

 yellow, transparent to translucent. They often show a combination 

 of the prism, one or two different scalenohedrons, terminated (often 

 on both ends) by the negative \ rhombohedron. Often the prism pre- 

 dominates, terminated by faces of two different rhombohedrons. Also 

 in many other combinations. They sometimes enclose Millerite and 

 Dolomite crystals. 



In Jasper Co., on Spring River, in a violet colored variety. 



At Gratiby, Ne-wton Co.^ in crystalline masses, sometimes enclosing 

 seams and crystals of Galenite. and in scalenohedral crystals up to 6 

 inches long. 



In Washington Co., dark yellow crystals, several inches long, with glo- 

 bular aggregations of Barite, on Galenite. 



In very many other localities, in crystals or crystalline masses, or in 

 stalactitic forms, or as an incrustation. 



Ar AG ON ITE. 



In Jasper Co., in dark reddish-brown columnar aggregations. 



Near Lexington, Lafayette Co., in crystals. 



In Washington Co,, Franklin Co., and in many other localities. 

 Gypsl'm. 



In St. Louis, in cavities of the limestone in perfectly transparent crys- 

 tals, of strong vitreous lustre, sometimes \\ inches long and \ of an 

 inch broad. They show combinations of the clino-pinacoid with the 

 faces of several prisms, terminated by faces the negative and positive 

 hemi-pyramide. The crystals, often lamellar by a large development 

 of the faces of the clino-pinacoid, are grouped together parallel to each 

 other, and seated on crystalline, snowy-white, corroded masses of 

 Gypsum. 



Near Salisbury, Chariton Co.; Atlanta, Macon Co.; Knob Noster, 

 Johnson Co. ; Lexington, Lafayette Co.; Grundy Co., and Carroll 

 Co., crystals of Selenite well developed, embedded in the clay and 

 shales of the Coal-measures. These crystals are translucent to trans- 

 parent, of pearly or subvitrious lustre. They show the combination 

 of the prism, both hemi-pyramides, and the clino-pinacoid, and are 

 often about \\ inches long, | of an inch broad, and \ of an inch thick 

 between the faces of the pinacoid. 



Anhydrite. 



In St. Louis, in cavities of the limestone, in rounded aggregations, of 



