THE 



American Naturalist, 



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NATURAL HI5T0RY. 



E. D. COPE and J. S. KINGSLEY, 



Dr. C. O. Whitman, Dr. C. E. Bessey, H. C Mercer, Prof. C. M. Weed, 



Prof. W. S. Bavley, Prof. E. A. Andrews, Prof. A. C. Giee, 



Prof. H. C. Warren, Erwin F. Smith. 



VOLTJJMK XXX. 



PHILADELPHIA, U. S. A. 



THE EDWARDS & DOCKER C0. f 



518 & 520 MINOR STREET, 



