CHAP. XIX.] 



REPTILES. 



377 



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

 and Dimodes, with one species each, are from New Orleans ; and 

 a few others imperfectly known from Tropical America. 



Family 9.— PSAMMOPHID^. (5 Genera, 20 Species.) 



General Distribution. 



Neotropical Nearctic Pal^arctic Ethiopian Oriental Australian 

 Sub-regions. Sub-regions. Sub-regions. Sub-regions. Sub-regions. Sub-regions. 



2 1.2.3.4 1 —3 .4 



The Psammophidee, 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 : — 



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

 Calcutta ; Ccelopdtis (1 sp.). North and West Africa ; Mimophis 

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

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

 sp.), Tropical Africa. 



Family 10.— EACHIODONTID^. (1 Genus, 2 Species.) 



General Distribution. 



Neotropical 

 Sub-regions. 



Nearctic 

 Sub-regions. 



Pal /E ARCTIC 

 Sub-regions. 



Ethiopian 

 Sub-regions. 



Oriental 

 Sdb-reo.ions. 



Australian 

 Sub-regions. 



— 2.3 



The Rachiodontidse are a small and very isolated group of 

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

 is confined to West and South Africa. 



