TABLE OF CONTEXTS OF VOLUME I. 



PART L STRUCTURE AND SPINNING ORGANS. 



CHAPTER I. 

 GENERAL CLASSIFICATION AND STRUCTURE. 



PAGES 



The Origin of the Name Spider Principal Groups, Sedentary and Wandering Tribal 

 Divisions Black-wall's Classification Thorell and Bertkau Highest Forms Superi- 

 ority of Lycosids Orbweavers and Lineweavers Anatomy of a Spider Caput 

 Eyes Mandibles -Sternum Labiuni MaxilUe and Palps Legs and Claws The 

 Abdomen Pulmonary Sac The Epigynum and Male Organs Hints to Collector 

 A Spidery How to Observe Spinningwork and Habits Preserving Specimens . . 15-33 



CHAPTER II. 

 THE SPINNING ORGANS. 



External Spinning Organs The Spinnerets or Spinning Fingers The Posterior Spin- 

 nerets Middle Spinnerets Anterior Spinnerets Bucholz and Landois' Studies 

 Studies of Meckel Spinning Spools Internal Spinning Organs Silk Glands Liquid 

 Silk Pyriform (Hands and Ducts Cylindrical Glands Treeform Glands Spinning 

 Spools of the Pyriform Glands Spigot Spools Spools of Middle and Anterior Spin- 

 nerets Generic Differences in Spinning Spools The Muscular System for Expelling 

 Silk 34-51 



PART II. GENERAL CHARACTERISTICS, CONSTRUCTION, 

 AND ARMATURE OF WEBS. 



CHAPTER III. 

 GENERAL CHARACTERISTICS OF ORBWEAYERS' SNARES. 



Popular Errors An Orbweb Denned Great Groups of Orbwebs Parts of the Orb- 

 Forms of the Hub The Free Zone Notched Zone 52-5! > 



CHAPTER IV. 

 CONSTRUCTION OF AN ORBWEB. 



Laying Out the Frame Dragline The Prime Foundation Foundations by Air Currents 

 Bridge Lines -Webs Between Trees Webs on Water Plants Cobweb Bridges Trial 

 Air Lines Swinging Inspection Baskets Jonathan Edwards as an Arachnologist 

 Double Foundation Lines Placing in Radii Alternate Apposition of Radii Form- 

 ing the Notched Zone 60-78 



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