TABLE OF CONTENTS OF VOLUME I. 



PART L— STRUCTURE AND SPINNING ORGANS. 



CHAPTER I. 

 GENERAL CLASSIFICATION AND STRUCTUKE. 



PAGES 



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

 Divisions — Blackwall's Classification — Thorell and Bertkau — Highest Forms — Superi- 

 ority of Lycosids — Orbweavers and Lincweavers — Anatomy of a Spider — Cajiut — 

 Eyes — Mandibles -Sternum — Labium — IMaxillse and Palps — Legs and Claws — The 

 Abdomen — Pulmonary Sac -The Plpigynum and Male Organs — Hints to Collector — 

 A Spidery — How to Observe Sj^inningwork and Habits —Preserving Specimens . . 15-33 



CHAPTER 11. 

 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 ^leckel — Spinning Spools — Internal Spinning Organs — Silk (ilands — Liquid 

 Silk — Pyriform Glands and Ducts — Cylindrical (iUinds — Treeform (ilands — Spinning 

 Spools of the Piriform 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 ORBWEAVERS' SNARES. 



Popular Errors — An Orbweb Defined — Great (iroups of Orbwebs — Parts of the Orb — 



Forms of the Hub — The Free Zone — Notcheil Zone 52-5!) 



CHAPTER IV. 



CONSTRUCTION OF AN ORBWEB. 



Laying Out the Frame — Dragline — The Prime Foundation — Foundations by .\ir Currents — 

 Bridge Lines —Webs Between Trees— AVelis on Water Plants — Cobweb Bridges — Trial 

 Air Lines — Swinging Inspection Baskets — Jonatlian Edwards as an .\rachnologist — 

 Double Foundation Lines — Placing in Radii — Alternate .Opposition of Radii— Form- 

 ing the Notched Zone 60-78 



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