CONTENTS xi 



presence of the reindeer south of its existing range Evidences 

 of a southern fauna in the north and of its gradual southward 

 retreat Helicina Turkeys and the Florida parrot On the 

 dispersal of fresh- water mussels Eelicts of the past Bony-pike 

 and bow-fin The blind fauna of America . 144-166 



CHAPTER VIII 



THE SOUTH-EASTERN STATES AND BERMUDA 



On the vegetation and general features of Florida The geological 

 history of Florida On the reptiles and amphibians of the south- 

 east The south-east as a centre of dispersal The terrestrial 

 mollusks of Florida On scorpions and dragon-flies Alligators 

 and crocodiles, their origin and past history The fauna of 

 Bermuda island The geology and flora of Bermuda The birds 

 and their origin Terrestrial isopods, spiders and the land 

 nemertean worm Geonemertes On the snails of Bermuda and 

 their ancestors The origin of the Bermudan fauna . 167-195 



CHAPTER IX 



SOUTH-WESTERN NORTH AMERICA AND ITS FAUNA 



On the so-called " Sonoran Region " The palaeogeography of 

 California and the adjoining States On the western insecti- 

 vores On horned toads and burrowing lizards Discontinuous 

 distribution of some western toads The snails of California 

 The fauna of lower California and its Cape region On the 

 European element of the Californian fauna as illustrated by the 

 mollusks, butterflies and ants The crayfishes of the south- 

 west and their origin Various faunistic problems On mam- 

 malian affinities The American rabbits and their relations 

 The former Atlantic land connections between the New World 

 and the Old, supported by the evidence derived from Tertiary 

 mammals Conclusions 196-232 



CHAPTER X 



THE FAUNA OF CENTRAL AMERICA 



The fishes of Central America and their origin On the geology and 

 palaeogeography of Central America Importance of deter- 

 mining the age of Central America Evidence derived from a 

 study of the marine faunas On the faunistic affinities between 

 North and South America The flora of Central America 

 Monkeys and raccoons On birds, tortoises and snakes The 



