PLATE III 



Hind Feet (a) and Fore Feet (d) of Breeding Male Ani'ra. XI. 



1. Rana sylvatica. 4. Rana clamata. 7. Hyla versicolor. 



2 Rana pipiens. 5. Chorophilu.s triseriatus. 8. Bufo lentigino.sus americanus. 



3. Rana palustris. 6. Hyla pickeringii. 9. Rana catesbeiana. 



