cnAi'. XIX.] 



EEPTILES. 



377 



Africa ; HelicojJs (2 sp.), North and South America ; Farancia 

 and Dimodcs, -with one species each, are from New Orleans ; and 

 a few others imperfectly known from Tropical America. 



Family P.— PSAMMOPHIDiE. (5 Genera, 20 Species.) 



General Distribution. 



Neotropical 

 Sub-regions. 



Nearctic 

 Sub-regions. 



PAr,.«ARCTIC 



Sub-regions. 



Ethiopian 

 Sub-regions. 



Oriental 

 Sub-regions. 



1 .2.3.4 1—3.4 



au.stralian 

 Sub-regions. 



The Psammophidte, or Desert Snakes, are a small group 

 characteristic of the Ethiopian and Oriental regions, but more 

 abundant in the former. The distribution of the genera is as 

 follows : — 



Psanimophis (16 sp.), ranges from "West Africa to Persia and 

 Calcutta; Codopdtis (1 sp.), North and West Africa; 31tmophis 

 (1 sp.), Madagascar ; Psavimodynastes (2 sp.), Sikhim to Cochin 

 China, Borneo and the Philippine Islands ; and Dromophis (1 

 sp.), Tropical Africa. 



Family 10.— PACHIODONTID.E. (1 Genus, 2 Species.) 

 General Distribution. 



Nfotropical 

 sub-uegions. 



Nearctic 

 Sub-regions 



Pal.earctic 

 Sub-uegio.\s. 



Ethiopian 



sub-kegions. 



Oriental 

 Sub-regions. 



Australian 

 Sub-regions. 



2.3 - 



The Eachiodontida^ are a small and very isolated group of 

 snakes of doubtful affinities. The only genus, DasyiKltis (2 sp.), 

 is confined to West and South Africa. 



