﻿TABLE OF CONTENTS. 



Introductory Remarks ...... 



I. Historical Introduction . 



II. The General Structure of the Skeleton . 



1. General Form and Mode of Growth 



2. Chemical Composition and Mode of Preservation 



3. The Minute Structure of the Skeleton 



a. The Skeletal Tissue . . . . 



b. The Eadial Pillars and Concentric Laminae 



c. Variations in the Structure of these 



d. The Interlaminar Spaces . 



e. The Zooidal Tubes . 



f. The Astrorhiza? . 

 cj. The Axial Tubes . 

 k. The Epitheca . 

 i. The Surface . 



j. The Reproductive Orgaos . 



III. Systematic Position and Affinities of the Stromatoporoids 



IV. Sketch-Classification . 



V. Families and Genera of the Stromatoporoids 



1. Actinostromidiv . 



2. Labechiidx . 



3. Stromatoporidie . 



4. Idiostromidce 



VI. The Nature of " Gaunopora " 



VII. Description of Species .... 

 VIII. Supplement to the Historical Introduction 

 IX. Appendix . 



X. Index 



