TABLE OF CONTENTS. 



Inteoductoey Bemaeks .... 

 I. Hisioeical Inteoduction . 



II. The Genebal Steuctuee of the Skeleton . 



1. General Pom 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 Lamina? 



c. Variations in the Structure of these 



d. The Interlaminar Spaces 



e. The Zooidal Tubes 

 /. The Astrorhiza? 

 g. The Axial Tubes 

 h. The Epitheca 

 i. The Surface 

 j. The Reproductive Organs 



III. Systematic Position and Affinities of the Steomatopoeoids 

 IV. Sketch- Classification . . . . • 



V. Families and Geneea of the Steomatopoeoids 



1. Actinostromidie . 



2. Labechiidse ...■■• 



3. Strom atoporidx . . • • • 



4. Idiostromidse ..•■•• 



VI. The Natuee of " Caunopora " 

 VII. Description of Species . 

 VIII. Supplement to the Histoeical Inteoduction 

 IX. Appendix . . • • • 



X. Index ...••• 



27 

 27 

 29 

 32 

 35 

 39 

 43 

 47 

 49 

 53 

 57 

 58 

 59 

 62 



64 



72 



75 

 75 

 80 

 90 

 98 



110 



131—228 



. 229 



. 232 



. 233 



