TABLE OF CONTENTS. 



Page 



Introduction 553 



Historical review f>56 



Distribution of species occurring in Porto Rico (table) 560 



Relations and origin of the Porto Rican herpetological fauna 561 



Vertical distribution ' 565 



Bibliography 567 



Batrachians and reptiles of Porto Rico 569 



Class Batrachia 569 



Class Reptilia 599 



Order Squamata 599 



Suborder Sauria 599 



Suborder Serpen tes 683 



Order Chelonia 707 



Index _ . 721 



551 



