SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE 



VOL. 35, NO. 3, PL. 2 



Fifi. 6 

 Right femur of 

 Amblystoma tigrinum 

 (most primitive amphibian) 



Fig. 7 

 Right femur of 

 Hyla versicolor 

 (tree frog) 



Fig. 8 

 Right femur of Hyla 

 arenicolor 



Fig. 9 

 Right femur of Hyla 

 femoralis 



Fig. 10 

 Right femur of Hyla 

 evittata 



Fig. 11 

 Right femur of Hyla 

 cinerea 



Fig. 12 

 Right femur of Hyla 

 regilla 



Fig. 13 

 Right femur of Hyla 

 squirella 



Fig. 14 

 Right femur of Hyla 

 gratiosa 



Fig. 15 

 Right femur of 

 Dendrobates tinctorius 



Fig. 16 

 Right femur of 

 Leptodaetylus albilabris 



Fig. 17 



Right femur of Chorophilus 

 feriarum 



Fic. 18 

 Right femur of Acris 

 grvllus 



Fig. 19 

 Right femur of Rana 

 catesbiana 



Fig. 20 

 Right femur of Rana 

 palustris 



Fig. 21 Fig. 22 Fig. 23 Fig. 24 Fig. 25 



Right femur of Rana Right femur of Rana Right femur of Rana Right femur of Rana Right femur of 



areolata eirculosa aurora pretiosa draytonii Spelerpes ruber 



17 



