TABLE OF CONTENTS 



PAGE 



INTRODUKTION 7 



THE SYSTEM 9 



PHYLOGENETIC DEVELOPMENT OF THE ARACHNIDA . . 18 

 COMPARISON OF THE NORTH AMERICAN CARBONIFEROUS 

 ARACHNOLOGICAL FAUNA WITH THAT OF EUROPE AND 



WITH THE RECENT FAUNA 23 



SPECIAL PART 27 



Phylum Arthropoda. Key to the classes 27 



Class Arachnida. Key to the Orders 28 



Order Scorpiones 30 



List of Described Species of Scorpions 31 



Key to Genera of North American Carboniferous Scorpions 36 



Description of North American Palaeozoic Scorpions . . 36 



Order Pedipalpi 56 



List of Described Species of Pedipalpi 58 



Key to (ienera of North American Carboniferous Pedipalpi 60 



Description of North American Carboniferous Pedipalpi . 60 



Order Kustarachnae 71 



Order SoUfugae 73 



Order Ricinulei 75 



Order Araneae 85 



List of Described species of Araneae 86 



Description of North American Carboniferous Araneae. . 88 



Order Anthracomarti 92 



List of Described Species of Anthracomarti .... 94 



Description of North American Carboniferous Anthracomarti 99 



Order Opihones 108 



Order Haptopoda 112 



Order Phalangiotarbi 112 



List of Described species of Phalangiotarbi . . . .113 



Description of North American Species of Phalangiotarbi . 115 



Key to the Genera of Phalangiotarbidae . . . .117 



Key to the Genera of Architarbidae 123 



