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Arachnida (incl. Tardigrada and Pentastomida). 
I. Titles=3000 . . 
• # 
.. 10 
II. Subject-Index =3003-3027 : — 
General, Economics . . , . 
.. 15 
Structure 1 . . . . . . ' 
.. 15 
Physiology .. 
.. 16 
Development. . , . . . t . 
.. 16 
Ethology 
, • • 
.. 16 
Variation and Aetiology . . 
.. 16 
Distribution (Geographical) 
.. 17 
Distribution (Geological) .... 
.. 18 
III. Systematic Index=3031 : — 
General 
Scorpiones . . 
Pedipalpi 
Palpigradi (vacant) 
Araueae 
Aviculariidae 
Atypidae .. 
Uloboridae 
Dictynidae. . 
Eresidae . . 
Oonopidae . . 
Sicariidae . . 
Dysderidae 
Prodido midae 
. Drassidae . . 
Palpiraanidae 
Zodariidae. . 
U rocteidae 
Hersiliidae 
Pholcidae . . 
Therjdiidae 
Argiopidae 
Thomisidae 
Glubionidae 
Ageleniuae 
Pisauridae . , 
Lycosidae . . 
Salticidae . . 
Solifugae 
Pseudoscorpiones 
Opiliones 
Iticinulei, etc. (vacant). 
• • 
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