CARAPACE AND PLASTRON OF THE CHELONIAN REPTILES. 
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Description of the Plate. 
PLATE XIII. 
(All the figui’es are of the natural size.) 
Fig'. 1. Embryo Turtle {Chelone Mijdaa). 
1 a. Ossified parts of its carapace. 
Fig-. 2. Side view of the same embryo. 
2 a. Side view of the ossified parts of its carapace. 
Fig. 3. Front view of the same embryo. 
3 a. Ossified rudiments of the plastron. 
Fig. 4. External surface of the incipient carapace of a young Tortoise {Testiido 
indica). 
Fig. 5. Internal view of the same carapace. 
Fig. 6. External surface of the plastron of the same young Tortoise. 
Fig. 7- Internal view of the same plastron. 
Fig. 8. Ideal section of the same carapace and plastron. 
The letters and figures are explained in the text. 
