P L A T E L X I . 



TrstuAUiata from the White River formation, one-thirtl natural size. Page 762. 

 Fig. 1. — Testiido hitkiineiis. Tyjie, from above ; a, from below. Page 765. 



Fig. '2. — Testudo Vqionius. Type, clavicle ( " episternal ") from above ; a, the same, inner edge. Pago 766. 

 Fig. 3. — TesUido Uijoiniis. Part of nuchal vertebral bone of same specimen, from above. Page 766. 

 Fig. 4. — Testiido amphithorax. Plastron from below ; the parts separated by the hyo-hyposternal suture, 



from different individuals. Page 767. 

 Fig. 5. — Tesliido qitadratiis. Lip of plastron, from below. Page 7(54. 



