14 



COMPLETE INSTRUCTION IN 



silk of the world, but also the necessary substance 

 for the generating or reproducing its kind for suc- 

 ceeding generations. 



Ninth Day of Fourth Molt. 



The worm secretes the silk in two membranous 

 tubes, that fold and enfolcl in longitudinal layers 

 nearly the whole length of the body. These 

 tubes taper toward the upper end, and terminate 

 in two little holes, called spinnerets, in the lower 

 jaws. Through these holes the silk passes out of 

 the worm, and is by it arranged layer upon layer 



