ILLUSTRATIONS 



PLATE I. Cambrian and Silurian fossils. 



II. Devonian fossils. 

 III. Devonian fossils. 

 IV. Devonian fossils. 

 V. Devonian fossils. 

 VI. Devonian fossils. 

 VII. Carboniferous fossils. 

 VIII. Carboniferous fossils. 

 IX. Cambrian fossils. 

 X. Cambrian fossils. 

 XI. Silurian fossils. 

 XII. Silurian fossils. 

 XIII. Devonian fossils. 

 XIV. Devonian fossils. 

 XV. Devonian fossils. 

 XVI. Devonian fossils. 

 XVII. Devonian fossils. 

 XVIII. Carboniferous fossils. 

 XIX. Carboniferous fossils. 

 XX. Carboniferous fossils. 



- XXI. Outline figures of Olenellns and Lingula. 

 XXII. Carboniferous fossils. 

 XXIII. Carboniferous fossils. 

 XXIV. Carboniferous fossils. 



Fid. 1. Cross-section of Ortboceras 



2. Cross-section of Ortboceras 



3. Section of BelleropJion majusculus 



4. Outline figure of Ampullaria ? Powelli 



5. Operculnm of Ampullaria ? Powelli 



G. Outline figure of Physa prisca '..... 



7. Outline figure of Zaptychius carbonaria 



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