SEGMENTED SCHIZOCOELS 



233 



Figure 14.9 Class Arachnida. Order Scorpionido: 1, Centrurus, a scorpion. Order Pseudoscor- 

 pionido: 2, Apocheiridium, a pseudoscropion (x 5). Order Acorino: 3, Eutrombicula, a chigger mite 

 (x 5); 4, Dermacen/or, a tick. Order Pholangido: 5, Phaiangium, a horvestmon. Order Soipugido: 6, 

 Eremobofes, o wind scorpion. Order Pedipolpi: 7, Mosffgoprocfus, o whip scorpion (to 4 inches 

 long); 8, Charinus, a vinegoroon. Order Polpigrodo: 9, Koenenio, a micro whip scorpion. Order 

 Aroneido: 10, Bothriocyrtum, o trapdoor spider, o member of the suborder of bird spiders. 



