422 GENERAL BIOLOGY 



Class IV. Linguatulida ( ) 



Order 1. Pentastomoidea ( ) 



Class V. Pantopoda ( ) 



Order 1. Clossendromorpha ( ) 



Order 2. Nymphomorpha ) 



Order 3. Pycnogomorpha ( ) 



Class VI. Arachnoidea ( ) 



Subclass 1. Cteiphora ( ) 



Order 1. Scorpiones ( ) 



Subclass 2. Lipoctena ( ) 



Order 1. Pedipalpi ( ) 



Order 2. Araneae ( ) 



Order 3. Meridogastres ( ) 



Order 4. Opiliones ( ) 



Order 5. Acarina ( ) 



Order 6. Cheloneti ( ) 



Order 7. Solifugae ( ) 



Class VII. Myriapoda ( ) 



Subclass 1. Opisthogoneata ( ) 



Order 1. Chilopoda ( ) 



Subclass 2. Progoneata ( ) 



Order 1. Symphyla ( ) 



Order 2. Pauropoda ( ) 



Order 3. Diplopoda ( ) 



Class VIII. Mirientomata ( ) 



Order 1. Protura ( ) 



Class IX. Collembola ( ) 



Order 1. Arthropleona ( ) 



Order 2. Symphopleona ( ) 



Class X. Campodeoidea ( ) 



Order 1. Rhabdura ( ^> 



Order 2. Dicellura ( ) 



Class XI. Thysanura ( ) 



Order 1. Lepismatoidea ( ) 



Order 2. Machiloidea ( ) 



