99. Flint. Locality unknown.

100. Granular sulphuret of lead. Mine La Motte, Missouri.

101. Pumice of the Missouri river.

102. Pseudo-volcanic product of same.

103. Ferruginous sulphate of barytes, on radiated quartz. Lead-mines of Missouri.

104. Crested brown oxide of iron. Jefferson county, Mo.

105. Radiated uartz, incrusted with sulphate of barytes and iron. Potosi, Mo.

106. Granular lead-ore (a sulphuret). Mine La Motte, Mo.

107. Brown oxide of iron, crystallized in octahedrons. Washington county, Mo.

108. Mamillary quartz, on a basis of agate. River St. Francis, Mo.