CONTENTS. 



PACiK 



Preface ................. v 



Abstract ................. ix 



I. The Order Opiliones, particularly the Suborder Cyphomithalmi ..... 1 



A. Historical Introduction ............. 1 



B. The General Structure of Opiliones, with special regard to Cyphophthalmi ... 4 



1. The Bermoskeleton ............. 4 



2. Cephalothorax .............. 4 



3. Abdomen ............... 9 



4. Tiie Limbs 24 



5. The Mouth and Stomotheca ........... 30 



6. The Organs of Sense ............. 35 



7. The Odoriferous Glands ............ 42 



8. Remarks as to the other interior Organs ......... 46 



U. The Alimentary Canal ............ 46 



10. Organs of Excretion ............. 47 



11. Organs of Respiration ............. 51 



12. The Sexual Organs ............. 52 



13. The external sexual Characters, particularly in Cyphophthalmi ..... 64 



14. On Gibocelhim sudeticum Stecker .......... 67 



C. Systematic Pai't .............. 75 



Termini et ratio mensuras quasdam sumendi ......... 78 



Characterization of the Order Opiliones .......... 78 



Characterization of the Suborder Palpatores, its Families, the Subfamilies of Phalangioida> 



and the Genera of Ischyropsalidoidaj . . . . . . . . . 79 



Characterization of the Suborder Laniatores ......... 85 



Cliaracterization of the Suborder Cyphophthalmi, the Family Sironoida;, its Subfamilies 



and genera ............... 86 



