Proceedings of the Ohio State Academy of Science. yi 



A Supernumerary Appendage in Otocryptops sexspinosus (Chil- 

 opoda). L. B. Walton 



Fine crystals of Hopeite and of Tarhuttite, two rare hydrous phos- 

 phates of Zinc from Africa. Geo. D. Hubbard 



Maps and diagrams illustrating an Ecological Study of Forest types. 



F. B. H. Brown 



