PLATE XVIII. 



All figures three-fourths natural size. 



Procamchis major. 



Fig. I . Right astragalus. Posterior view. 



Figs. 2, 3, and 4. Proximal, median, and ungual phalanges. 



Procatiicliis incdiiis. 

 Fig. 5. Right astragalus. Posterior view. 

 Fig. 6. Proximal phalanx. 



Procamchis miniinus. 

 Fig. 7. Right astragalus. Posterior view. 

 Figs. 8, 9, and 10. Proximal, median, and ungual phalanges. 



Hippotlierium pHcatile. 

 Fig. II. Proximal phalanx. 

 Fig. 12. Left metatarsal. Proximal end. 

 Fig. 13. Left metacarpal. Proximal end. 

 Fig. 14. Left astragalus. 



Hippotheriwn gratum. 

 Fig. 15. Left astragalus. 

 Fig. 16. Proximal phalanx. 



