40 The Striicticre and Habits of Spiders. 



abdomen. Each tube is the outlet of a separate 

 gland. Fig. i8, a, shows four small tubes from 

 a spinneret of Epeira, each with a small gland 

 attached; and Fig. i2,,b,2. large tube, with one 

 of the large glands which extends forward the 

 whole length of the abdomen. Fig. 5, u. 



Fi^. 17. 



Fig. i3. 



The shape of the spinnerets, and size and 

 arrangement of the tubes, varv" in different spe- 

 cies. Fig. 19 is a spinneret of Prosthesima, 

 where there are a few large tubes in place of 

 many small ones. In Agale7ia the two hinder 

 spinnerets are long, and have spinning-tubes 

 along the under side of the last joint. Fig. 20. 



