538 EEPORT ON NATIONAL MUSEUM, 1886. 



Dolomite. Devonian; fine; light buff and drab; coarsely fossiliferous. Two speci- 

 mens. Near Osage Station, Mitchell County. Armstrong's qnarry. Tenth Cen- 

 sus, 1880. 2G122. 



Devonian; dark; compact. Near Mason City, Cerro Gordo County. J. L. 



Parker's quarry. Tenth Census, 1880. 26065. 

 — ! — Devonian; fine; buff and coarse drab. Two specimens. Near Bristow, P>utler 

 County. E. Erick's quarry. Tenth Census, 1880. 26088. 



Devonian; fine; compact. Cedar Ealls, Black Hawk County. E, Carpenter's 



quarry. Tentli Census, 1880. 25900. 



Devonian ; fine ; yellowish brown. Two specimens. Near Laporte City, 



Black Hawk County. G. A. Knowles's quarry. Tenth Census, 1880. 26764. 



Sub-Carboniferous; compact; drab. Near Dakotah Station, Humboldt County. 



Quarry of Miner &. Howell. Tenth Census, 1880. 26067, 



Sub-Carboniferous; fine; compact. Humboldt, Humboldt County. A. B. Sny- 



der's quarry. Tenth Census, 1880. 26062. 



Sub-Carboniferous : compact, with red blotches. Humboldt, Humboldt County. 



C. A. Labeer".s quarry. Tenth Census, 1880. 2606:>. 



Sub-Carboniferous; light brown.. Near Iowa Ealls, Hardin County. G. W. 



Chapman's quarry. Tenth Census, 18S0. 25986. 



Sub-Carboniferous; compact; brown. Near Iowa Ealls, Hardin County. L. 



L. Kelly's quarry. Tenth Census, 1880. 26705. 



Sub-Carboniferous; fine; buff. Quarry, Marshall County. Le Grand Quarry 



Company. Tenth Census, 1880. 25479. 



Sub-Carboniferous; fine; light brown. Near Ames, Story County. P. K. 



Craig's qnarry. Tenth Census, 1880. 25498. 



Sub-Carboniferous; fine; drab. Near Ames Station, Story County. E. Coe's 



quarry. Tenth Census, 1880. 2.^-466. 



Sub-Carboniferous; light gray; quartz-bearing. Keokuk, Leo County. P. 



Tigue's quarrj*. Tenth Census, 1880. 25369. 



Sub-Carboniferous ; finely vesicular. Near Eranklln, Lee County. C. Graner's 



quarry. Teqth Census, 1880. 25368. 



Niagara; drab; mottled. Delhi, Delaware County. F. B. Doolif tie's quarry. 



Tenth Census, 1880. 25701. 



Siliceous dolomite. Lower Silurian; coarse; variegated. Lansing. Allamakee 

 County. City of Lansing Quarries. Tenth Census, 1880. 26803. 



Upper Silurian; buff; porous. Near Postville, Allamakee County. E. H. 



William's quarry. Tenth Census. 1880. 26215. 



Devonian ; compact. Near Waterloo, Black Hawk County. W. Lane's quarry. 



Tenth Census, 1880. 25933. 



Niagara ; buff; dendritic. Near Delhi, Delaware County. .1. IT. Peter's qu.irry. 



Tenth Census, 1880. 25702. 



Ferrviginotis dolomite. Upper Silurian; coarse and fine; buff. Two specimens. 

 Near Sabula, .Jackson County. E. A. Wood's quarry. Tentli Census, 1880. 2.5865. 



Upper Silurian; buff. Near Maquoketa, Jackson County. A. Connel's quarry. 



Tenth Census, 1880. 25830. 



Upper Silurian ; coarse ; yellow. Clinton, Scott County. T. Purcell's quarry. 



Tenth Census, 1880, 2.5829. 



Upper Silurian; fine; light buff. Ncir Le Claire, Scott County. E. Thele- 



raann's quarr,y. Tenth Census, 1880. 25826. 



