TABLE OF CONTENTS OF VOLUME T. 



PART L— STRUCTURE AND SPINNING ORGANS. 



CHAPTER I. 

 GENERAL CLASSIFICATION AND STRUCTUKE. 



PAGES 



The Origin of the Name Spider — Principal (n-oupp, Sedentary and Wandering— Tribal 

 Divisions — Blackwall's Classification — Thorell and Bertkau — Highest Fornis^Sui)eri- 

 ority of Lycosids — Orbweavers and Lineweavers — Anatomy of a Spider — Caput — 

 Eyes — Mandibles -Sternum — Labium — ^Maxill;^ and Palps — Legs and Claws — The 

 Abdomen — Pulmonary Sac -The Epigynum and ^fale Organs — Hints to Collector — 

 A Spidery— How to Observe Spinningwork and Habits —I'reserving Specimens . . 15-33 



CHAPTER II. 

 THE SPINNING ORGANS. 



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

 nerets — ^liddle Spinnerets — Anterior Spinnerets — Bucholz and Landois' Studies — 

 Studies of Meckel — Spinning Spools — Internal Spinning Organs — Silk (ilands^Liquid 

 Silk — Pyriform (ilands and Ducts — Cylindrical (ilands — Treefonn (ilands — Sjjinning 

 Spools of the Pyriform (ilands — Spigot Spools — Spools of ]\Iiddie and Anterior Spin- 

 nerets — Generic Differences in Spinning Spools — The iMuscular System fur Kxpelling 

 Silk ' 34-51 



PART II.— GENERAL CHARACTERISTICS, CONSTRUCTION, 



AND ARMATURE OF WEBS. 



CHAPTER III. 



GENERAL CHARACTEKISTICS OF OlUnVEA VERS' SNARES. 



Popular Errors — An Orbweb Defined — (ireat (iroups of Orliwcbs— Tarts of tlie Orb — 



Forms of the Hub— The Free Zone— Notched Zoiu' 52-5!i 



CHAPTER IV. 

 CONSTRUCTION OF AN ORBWEH. 



Laying Out tlie Frame — Dragline — Tlic I'rinu' Foundation — Foundations l)y Air Currents — 

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

 Air Lines — Swinging Inspection Baskets— Jonatlian Edwards as an Arachnologist — 

 Double Foundation Lines — I'laciiig in Radii — Alternate Apposition of Uadii — Form- 

 ing the Notified Zone (50-78 



(9) 



