Bulletin of the Museum of Comparative Zoology 



AT HARVARD COLLEGE. 



Vol. XL. No. 6. 



POLYDACTYLTSM IN MAN AND THE DOMESTIC ANIMALS, 



WITH ESPECIAL REFERENCE TO DIGITAL 



VARIATIONS IN SWINE. 



By C. W. Pkentiss. 



With Twenty-two Plates. 



CAMBRIDGE, MASS., U. S. A. : 



PRINTED FOR THE MUSEUM. 



April, 1003. 



