10 



In conclusion, let me say that this brief sketch is not ofíered 

 as a complete account of the silk of spiders. I have merely 

 attempted to bring together the more striking features of what 

 I have observed in this field of study, a field that has not yet 

 received the attention it merits. 



EXPLANATION OF PLATES 111, IV, AND V. 



Fig. I 

 Fig. 2 

 Fig. 3 

 Fig. 4 

 Fig. 5 

 Fig. 6 

 Fig. 7 

 Fig. 

 Fig. 



— An attachment disc (p. 3). 



— A stabilimentum, common type (p. 



— A stabilimentum, lace-like type (p. 



— Retreat of Ar anea thaddeus (p. 5). 



— Viscid silk of Aranea (p. 6). 



— Hackled band of Hypiiotes (p. 7). 

 Hackled band of Amaiirobius (p. 7) 

 Hackled band of Filistata (p. 8). 

 Web of Filistata hibernalis (p. 8). 



