Reptiles and Amphibians of Illinois. 388 



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



Fig. 19.— liones of the rudimentary hitid limb of Boa scytale. 

 (After Hoffmann.) 



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

 (After Hoffmann.) 



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



PLATE XIV. 



Fig. 22.— Nana c/amata: a, hind foot; b, fore foot. 



Fig. 23. — Rana cateshyana: a, hind foot; h, fore foot. 



Fig. 24.— ^c/i.9 gry'l>i,s : a, hind foot; h, fore foot. 



Fig. 25. — 'Ihorophilns triseriatas : a, hmd foot; h, fore foot. 



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



PLATE XV. 



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

 xphi&ternum; co, coracoid; c7, clavicle; os, omosternum; *■, scapula; 

 ss, suprascapul i. 



FiH. 28,— Sternal bones of Bufo lentiginosus : st, sternum; ocs, 

 xiphisternim; eo, coracoid; ep and ep\ epicoracoids; j5c, precera- 

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



Fig. 29.— Sternal bones of Hyla versicolor: .^i, sternum; os, omo- 

 sternum. 



