THE NORTH AMERICAN REPTILES AND 

 BATRACHIANS. 



A LIST OF THE SPECIES OCCURRING NORTH OF THE ISTHMUS 

 OF TEHUANTEPEC, WITH REFERENCES. 



BY SAMUEL CARMAN. 



THE following list is presented in the shape in which it 

 has proved most useful in my own work. As in other pub- 

 lications, I have placed the date immediately after the au- 

 thority, as one naturally thinks it. In order accurately to 

 determine species, comparison should be made with the 

 original description rather than with the opinion of a sub- 

 sequent writer; for this reason reference is made to the 

 discoverer and not to one in whose opinion the species 

 belongs to a genus some other than that in which it was 

 originally placed. Consequently, the references are under 

 names unaffected by frequent changes from one genus to 

 another. 



Heretofore, the faunal limit for North America has 

 been patriotically placed at the Mexican boundary. The 

 distribution of the reptiles and Batrachians proves this 

 limit to be unscientific, and shows the nearest approach to 

 a separation between the faunae of the Americas, North 

 and South, at the southern extremity of the tableland of 

 Mexico. Attempt is made in this list to include all the 

 species known to occur north of that point. 



When several localities for a species are given, they are 

 chosen to indicate the extent of its range as nearly as 

 possible. 



With a slight modification, the binomial system is fol- 

 lowed. For various reasons, as will be seen below, the tri- 



(3) 



