72 ZOOLOGICAL GEOGRAPHY. [part hi. 



Reptiles and Amphihia. — These classes not havinp; been 

 systcuiaLically collected, and the numerous described genera not 

 having undergone careful revision, little trustworthy information 

 can be derived from them. The following enumeration of the 

 chief groups hitherto noticed or described, will, however, show 

 very similar features to those presented by the birds — a general 

 relation to Neotropical forms, a more special relation to those 

 of Central America and Mexico, and a considerable number of 

 peculiar types. 



Snakes. — Arrhyton (Calamariida^.) from Cuba, Hypsirhynchus 

 from Barbadoes, Cryptodacus from Cuba, laltris from Hayti, and 

 Coloragia from Cuba (all Colubridse), have been described as 

 genera peculiar to the Antilles. Phylodryas and Dromicus 

 (Colubridse) are Antillean and Neotropical; Ahcetulla (Den- 

 drophidse) has the same distribution but extends to tropical 

 Africa ; Epicratcs and Corallus (Pythonidaj) are Neotropical 

 and Antillean ; while Chilaboihrus from Jamaica and Umgalia 

 from Cuba and Jamaica (both Pj^thonidse) are found elsewhere 

 only in Central America and Mexico. There appear to be no 

 Crotalida3 except an introduced Sj^ecies of Crasjycdocephalus in 

 St. Lucia. 



Lizards are more numerous, Ameiva (Teid.ie) is found all 

 over America. Gerrhonotus (Zonuridse) is Neotropical and occurs 

 in Cuba ; Gymnopihalmus is South American and Antillean. 

 Of Scincidae seven genera are noted. Cclestns (with 9 species) is 

 peculiar to the Antilles ; Camilia (1 species) to Jamaica, Panoplus 

 (I species) and Emhryopius (1 species) to Hayti; Diplogossus is 

 Antillean and South American ; while Plestiodon and Mahouya 

 are cosmopolite. Of Geckotidfe there are four genera ; Phyllo- 

 dadylus and Hemidactylns which are cosmopolite ; Sphccrodadylus 

 which is wholly American ; and Cuhina found only in Martinique 

 and Brazil. Of Iguanidse there are six genera ; Anolis, which 

 ranges all over America ; Polychrus, which is Neotropical ; 

 Iguana and Liocephalus which are South American ; Tropedurvs 

 found in Cuba and Brazil ; and Cyclura only known from 

 Jamaica, Cuba, and Central America. 



Amphihiri. — The genus Trachycephalus, belonging to the 



