REPTILIA. 



175 



horny plates (tortoise shell), and in the mesoblast below the bony 

 elements of the carapace (figs. 132 and 133). 



Immediately after hatching the yolk-sack becomes withdrawn into 

 the body ; while the external part of the allantois shrivels up. 



u 



-ft 



FIG. 132. CHELONE MIDAS, SECOND STAGE. 

 Letters as in fig. 131. 



Fio. 133. CHELONE MIDAS, Tmnr> STARE. 

 Letters as in fig. 131. r. rostrum. 



