THE AMERICAN FAUNA AND ITS ORIGIN. 
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Neotropical families Families common to Palseotropical families 
not in Palseotropical Neo and Palseotropical not in Neotropical 
Regions Regions. Regions. 
Urodela. 
Salamandridse. 
Bhinophrynida. 
Hylaplesidse. 
Plectromantidse. 
Pipidse. 
Anoura. 
Phryniscidte. 
Bufonidse. 
Engystomidse. 
Bombinatoridae. 
Alytidae. 
Pelodryadse. 
Hylidae. 
Polypedatidae. 
Eanidae. 
Discoglossidte. 
O 
Xenorhinidae. 
Dactylethridae. 
This comparison between the land animals of the southern 
lands of the western and eastern hemispheres, reveals some 
striking facts. Altogether there are ninety-seven families of 
land vertebrates common to the two hemispheres. Of these, 
nineteen are mammals, forty-one birds and thirty- six reptiles 
and amphibians. 
Of Carnivora, eight families are common ; of Bodentia, five ; 
while of birds there are, common, eleven families of Passeres, 
seven of Picarige, all four of Accipitres, eight of Gralke, and all 
six of Anseres. Of reptilia, fourteen families of snakes are 
represented in both New and Old Worlds, six of lizards and 
three of Chelonians ; while of amphibians there are ten families 
of the order Anoura (toads, frogs, etc.), common to the two 
hemispheres. 
On the other hand there is no family of Primates, none of 
Proboscidia, none of Edentata and none of Marsupialia, common 
to the Old World and the New, and as has been before stated, 
there is no species of the order Monotremata in America. 
Fossil Vertebrate Fauna of America, Quaternary and 
Tertiary. 
Although the affinities of the living fauna of the New World 
with that of the Old World are obvious, they are not so 
strongly marked or conspicuous as were the relations of the 
