AKMOUR OF THE TORTOISE. 



269 



penetrable bulwark to resist every attack by tooth or nail. The 

 ventral part is less strongly plated, but most of the creature's 

 enemies find it no easy task to turn it on its back, and thus to 

 assail the fortress on its weakest side. As several species attain 



a good defence ; 

 could, after all, 

 Ifity the want of 



head ut f its 



well provided for. 



.ill!. Id 





