226 



SUBKINGDOM AKTICTTLATA. 



are harmless, and beneficial in destroying dead Tegetable 

 matter. 



Julidae (down-like). — The "Thousand-legs" being slow- 

 moving, when alarmed, coils its body in a ring, with the tail 

 in the centre and the feet entirely concealed. 



SUB-CLASS III. ARACHNIDA. 



G-eneral Characteristics. — The Arachnids (spider-like) 

 hav.e the head and thorax amalgamated ; ocelli from two to 

 eight; and four pairs of legs. They molt six times in 

 coming to maturity, but undergo no metamorphosis. 



ARACHNIDA.- 



Abdomen "without segments and joined by 



a slender fedicel to the 



cephalo-thorai. 



Abdomen with segments and indistinctly 

 united to the cephalo- thorax, 



Abdomen without segments and merged 

 ■with the cephalo -thorax. 



Aranese, Spider. 



J- Pedipalpij Scorpion, etc. 



\ 



Acarina, Mite, etc 



ORDER ARANESE. 



General Characteristics. — Spiders have neither com- 

 pound eyes nor antennse. They possess a prehensile organ, 

 with a hook at the end, through which issues a poison fatal 



Fig. Sfic,. Fig. 387. 



Spider's Thread. 



Spider's Claw. 



