PERMIAN VERTEBRATES 729 



PLATE IV. 



I 



Fig. 1. Femur, a) anterior, b) posterior. 



Fig. 2. Tibia, a) proximal end, b) anterior view. 



Fig. 3. Fibula. 



Fig. 4. Ilium. 



Fig. 5. Another type of ilium. 



Fig. 6. Pubis, a) inner view, b) outer view. 



Fig. 7. Astragalus of Clepsydrops sp. a) tibial face, b) anterior ( ?) face, 

 c) calcaneal face, d) posterior (?) face. 



Fig. 8. Astragalus of Clepsydrofts sp. a) anterior (?) face, b) posterior (?) 

 face. , 



Fig. 9. Calcaneum. b) astragalus face. 



PLATE V. 



Figs, i and 2. Metacarpals of Clepsydrofts. 

 Figs. 3-9. Phalanges of Clepsydrofts. 



Fig. 10. Terminal phalanx of C. a) lateral, b) superior views. 

 Fig. 11. "Species one." 

 Fig. 12. " Species two." 



Fig. 13. Phalanges of Cricotus. a) lateral, b) anterior views. 

 Fig. 14. Phalanges of Cricotus. a) anterior, b) lateral views. 

 Figs. 15 and 16. Phalanges of Cricotus. 



Fig. 17. Diplocatilus salamandroides. Dorsal vertebra, a) lateral, b) 

 superior, c) terminal, d) inferior views. 

 Figs 18-21. Carpal bones. 

 Fig. 22. Proximal end of a rib 



Fig. 23. Incisor tooth, a) anterior view, b) lateral. 

 Fig. 24. Tooth. 



E. C. Case. 

 State Normal School, 

 Milwaukee, Wis. 



