76 A SPIDER. 



may occur also on the sides of these organs. Through these fine tubes a 

 viscid liquid is exuded, the scores of tiny threads coalescing into one 

 and hardening from contact with the air. 



The chelicerae are in most cases furnished with a furrow for the 

 reception of the folded claw. Frequently the margins of this furrow 

 are set with teeth. Does your specimen have a smooth rounded 

 prominence near the base of the chelicera? This is the lateral 

 condyle. It does not occur in all species. 



Exercise 3. Draw a chelicera, a pedipalp, a leg, and some of the spinning 

 tubes on an enlarged scale. 



Exercise 4. Draw an enlarged front view of the spider including the 

 chelicercR and the eye group. 



