192 



AKACHNIDA. 



The spiders possessing but one pair of respiratory 

 sacculi constitute the genus of Spinning Spiders 



FlG. 151. NEST OF TRAP-DOOR SPIDER. FlG. 152 TRAP-DOOR OPENING BY A LEVER. 



(Aranea), so called on account of the perfection of 

 their webs, the first named of the race, of course, 

 being Miss Arachne, who was turned into a spider 



FlG. 153. SECTION OF NEST. 



for having challenged Minerva to a spinning-match. 

 These are divided, according to their habits, into 



The Sedentary Arachnidans, distinguished by 

 weaving webs, or, at least, casting out threads in 

 order to entrap their prey, whilst they remain con- 

 cealed in the vicinity of their snares. These have 

 eight eyes, two or four of which are placed in the 

 middle of the forehead, and the rest on each side. 



