128 Trans. Acad. Sci. of St. Louis. 



Mine, in the Flat River district, St. Francois county, 

 where the Siegenite occurs mainly massive though occa- 

 sionally in fine crystals, in seams 2 to 4 inches thick in 

 magnesian limestone, by J. N. Judson. 



IRON. 



Arsenopyrite, at the Einstein Silver Mine, in Madison County, 

 as one of several minerals filling a fissure vein in granite ; 

 occurs as imperfect crystals 4 to 15 m.m. long and is 

 not abundant, by H. A. Wheeler. 



Also sparingly in association with pyrite in the limonite 

 deposits of the Mine-la-Motte estate, by J. W. Neill. 



Turgite, at Des Arc, Iron County, in stalactitic aggregations 

 of reddish-brown color and sub-metallic luster, and con 

 taining 5.8% combined water, by H. A. Wheeler ; 

 uncommon. 



Copiapite, at Granite Bend, Wayne County, as a yellow, 

 crystalline incrustation on pyrite in granite, by H. A. 

 Wheeler; rare. 



Petkoite, at Granite Bend, Wayne County, as a black, 

 amorphous incrustation on pyrite in granite, by H. A. 

 Wheeler ; rare. 



Dufrenite y at the Cherry Valley Iron Mines, Crawford 

 County, as minute green crystals less than 1 mm. in size, 

 incrusting specular hematite, by A. V. Leonhard ; un- 

 common. 



Cacoxenile, at Cherry Valley Mines, Crawford County, as a 

 thin, yellow, earthy incrustation on quartz and specular 

 hematite, by A. V. Leonhard; uncommon. 



Vivianite, from Joplin, Jasper County, as a blue, earthy 

 powder, by Dr. G. Hambach; rare. 



MANGANESE. 



Rhodochrosite, at Iron Mountain, St. Francois County, in 

 massive form, filling thin seams in specular hematite, by 

 W. B. Potter; uncommon. 



Manganocalcite, at Iron Mountain, St. Francois Couuty, as 

 crystalline masses, of a reddish-brown color, associated 

 with calcite in specular hematite, by W. B. Potter ; 

 uncommon. 



