26 EXPLANATION OF THE PLATES. 
PLATE XX. 
Figures half the diameter of nature. 
Testudo hemispherica. 
Fig. 1. Dorsal view of the carapace. 
Vig. 2. View of the sternum. 
Para, BY XOX 
Figures half the diameter of nature. . 
Testudo Owent. 
Fig. 1. Dorsal view of the carapace. 
Tig. 2. View of the sternum. 
PEAT heer 
Figures one-third the diameter of nature. 
Testudo Oulbertsonit. 
Vig. 1. Dorsal view of the carapace. 
Fig. 2. View of the sternum. 
PLATE X XIIT- 
Figures one-fourth the diameter of nature. 
Testudo lata. 
Fig. 1. Dorsal view of the carapace. 
Fig. 2. View of the sternum. 
PLAT Seve . 
Fig. 1. One-fourth the diameter of nature; the remaining figures one-third. 
Fig. 1. View of the left side of the carapace of Testudo lata. 
Fig. 2. View of the left side of the carapace of Testudo Culbertsonti. 
Fig. 3. View of the left side of the carapace of Testudo hemispherica. 
Fig. 4. View of the left side of the carapace of Testudo Owent. 
PUBLISHED BY THE SMITHSONIAN INSTITUTION, 
WASHINGTON, D.C. 
JUNE, 18538. 
