Reptiles and Amphibians of Illinois. 388 



Fig. 18.— Dorsal view of the head of Eumeoes faciatus. 



Fig. 19.— Bones |of the rudimentary hind limb of Boa seytale. 

 (After Hoffmann.) 



Fig. 20.— Rudimentary hind limb of Python, showing muscles. 

 (After Hoffmann.) 



Fig. 2\,—Rana areolata: a, hind foot; h, fore foot. 



PLATE XIV. 



Fig. 22. — Rana clamata: a, hind foot; 6, fore foot. 



Fig. 23. — Rana catesbyana : a, hind foot; b, fore foot. 



Fig. 24:.— Acris gryHns: a, hind foot; b, fore foot. 



Fig. 25. — Ihorophilns trlseriatus : a, hind foot; b, fore foot. 



Fig. 26. — Hyla versicolor: a, hind foot; b, fore foot. 



PLATE XV. 



Fig. 27. — Sternal bones of Rana catesbyana: st, sternum; xs, 

 xphisternum; co, coracoid; cl, clavicle; os, omosternum; s, scapula; 

 *s, suprascapula. 



Fiw.28. — Sternal bones of Bufo lentiginosus : st, sternum; xs, 

 xiphisternam; co, coracoid; ep and ep', epicoracoids; j9c, precera- 

 coids; cl, clavicle; s, scapula; ss. suprascapula. 



Fig. 29.— Sternal bones of ffyla mrsicolor: st, sternum; os, omo- 

 sternum. 



