ILLINOIS STATE MUSEUM 



OF 



Natural History.. 



SPRINGFIELD, ILLINOIS. 



Board of Trustees. 



John P. Altgeld, Governor. 



William H. Hinrichsen, Secretary of State. 



Henry Raab, Superintendent Public Instruction. 



George Walter Murray, 



Secretary. 



William F. E. Gurley, 



Slate Geologist and Curator. 



