332 



CHELONIA 



region. The Chelydridae, now restricted to North and Central 

 America, occurred formerly also in Europe. The Pleurodira, in 

 Mesozoic times plentiful in Europe, India, and North America, 

 are now restricted to South America, Australia, and Africa ; the 



-^- >■ -^ -^ 



V#^ DERMATEMVDftE. 

 ^P^^' TESTUDliMIDAE. ■/;. CINOSTERNIDAE, ^ ■^'' CHELYDRIDAE. '^fi PLATYSTERNIDAE. 



Fig. 70. — Geographical distribution of C'ryptoclirous tortoises. 



Pelomedusidae to Africa, Madagascar, and South America ; the 

 Chelydidae. to South America and Australia. In the latter 

 country all the Chelonians belong to the Chelydidae. The Trioriy- 

 choidea, occurring since the Cretaceous epoch in North America, 

 in Early and Mid-Tertiary times in Europe, are now restricted to 



"^ 



-S> = PFI nMFniicjinflF lllllll CHELYDIDAE. 



Fig. 71. — Geograpliical distribution of Fleurodirous tortoises. 



North America, Asia, and Africa. The country richest in Chelo- 

 nians is America ; North and Central America together possessing 

 representatives of all the families except the Pleurodira, and 

 these we know to have died out there. The Dermatemydidae, 



