CHAP. XIX.] 



REFIILES. 



409 



(6 sp.), and Pelomedusa (3 sp.), inhabit Tropical and South Africa 

 and Madagascar. 



Family 59.— TPJONYCHIDyE. (3 Genera, 25 Species.) 



Genkkal Distribution. 



Nkotropical 



BlB-REQIONS. 



Nearctio 

 Sub-regions. 



PAL.i:.VRCTlC 

 SUB-UEGIONS. 



Ethiopian 

 sub-region.s. 



Oriental j Australian 

 SuR-REc.ioNs. Sub-regions. 



— 3 



4. 



1.2.3 



1.2.3.4 



The distribution of the Trionychida^ or Soft Tortoises, is very 

 different from that of the Chelydidffi, yet is equally interesting. 

 They abound most in the Oriental region, extending beyond it 

 to ISTorthern Cliina and Japan. In the Nearctio region they are 

 only found in the Eastern States, corresponding curiously to 

 the distribution of plants, in which the affinity of Japan to 

 the Eastern States is greater than to California. The Triony- 

 chidte are also found over the Ethiopian region, but not in 

 Madagascar. 



The genera are, — Trionyx (17 sp.), which extends over the 

 whole area of the family as above indicated ; Cyclodcrma (5 sp.), 

 peculiar to Africa; Emyda (3 sp.), the peninsula of India, 

 Ceylon, and Africa. 



Family 60.— CHELONIID^. (2 Genera, 5 Species.) 

 General Distribution. — All the warm and tropical Seas. 



The Marine Turtles are almost universally distributed. 

 Dcrmatochdys (1 sp.), is found in the temperate seas of both 

 the Northern and Southern Hemispheres ; Chcloiie (4 sp.), ranges 

 over all the tropical seas — G. viridis, the epicureans' species, 

 inhabiting the Atlantic, while C. imlricata which produces the 

 " tortoiseshell " of commerce is found in the Indian and Pacific 

 oceans. 



