WRIGHT 



PLATE VII t 



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MOUTH-PARTS OF MATURE TADPOLES. X15. 



1. Rana catesbeiana. 5. Rana sylvatica. 



2. Rana palustris. 6. Bufo lentiginosusamericanus. 



3. Rana pipiens. 1 . Hyla pickeringii. 



4. Rana clamata. 8. Hvla versicolor. 



