XT! CONTENTS. 



Membranous Tissues 

 Fibrous Structures 

 Primitive Pibrous Tissues 

 Keratose Fibrous Tissues 

 Solid Simple Keratose Fibre 

 Spiculated Keratose Fibre 

 Hetro-spiculated Keratose Fibre . 

 Multi-spiculated Keratose Fibre 

 Inequi-spiculated Keratose Fibre . 

 Simple Fistulose Keratose Fibre 

 Compound Fistulose Keratose Fibre 

 Eegular Arenated Keratose Fibre 

 Irregular Arenated Keratose Fibre 

 Siliceous Fibre 

 Prehensile Fibres 

 Cellular Tissue 



Oeganization and Phtsiolost 

 The Skeleton 

 Sarcode 



The Sarcodous System 

 The Interstitial Canals and Cavities 

 Intermarginal Cavities 

 Dermal Membrane 

 The Pores 

 The Oscula . 

 Inhalation and Exhalation 

 Nutrition 



The Cilia and Ciliary Action 

 Eeproduction 

 Gemmules 



External Gemmulation 

 Propagation by Sarcodous Division 

 Growth and Development of Sponges 



