CONTENTS. 



I. Introductory Remarks 



II. Bibliographical History of Lepidodendron 

 § 1. Adolphe Brongniart 



2. Carruthers ... 



3. Schimper .... 



4. Williamson .... 



III. General Observations on Lepidodendron, Stigmaria, and Halonia 



IV. Description of the Specimens ..... 



§ 1. Specimen No. 31. Lepidodendron Harcourtii, PI. XIII, figs. 1 — 6 



2. Specimen No. 32. — — PI. XIV, figs. 1—3 



3. Specimen No. 33. Sigillaria vascularis, PI. XIV, figs. 4 — 6 





a. Halonia 



1 tortuosa 





b. — 



gracilis 





c. — 



regular is 



2. 



Richard Brown 





3. 



Unger 







4. 



Dawes . 







5. 



Hooker 







6. 



Brongniart 







7. 



Goldenberg 







8. 



Binney 







9. 



Schimper 







VI. Description of Specimens of Halonia 



§ 1. Specimen No. 34. Halonia regularis, PI. XV, figs. 1 



2. Specimen No. 35. 



3. Specimen No. 36. 



4. Specimen No. 37. 



5. Specimen No, 38. 



VII. Concluding Remarks 



PI. XVI, figs. 1—5 

 PI. XVII, figs. 1, 2, 3 

 PI. XVII, figs. 4, 5, 6 

 PI. XVIII, fig. 1 . 



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