CONTENTS. 



PAGE 



I. Introductory Remarks ...,...•■> 



II. Bibliographical History of Lepidodendron . . . . • .64 



§ 1. Adolphe Brongniart 64 



2. Carruthers 65 



3. Schimper 70 



4. Williamson . . . , . . . . • .71 



III. General Observations on Lepidodendron, Stigmaria, and Halonia . . .74* 



IV. Description of the Specimens ........ 77 



§ 1. Specimen No. 31. Lepidodendron Harcourtii, PL XIII, figs. 1 — 6 . . .77 



2. Specimen No. 32. — — PI. XIV, figs. 1—3 . . .80 



3. Specimen No. 33. Sigillaria vascularis, PI, XIV, figs. 4 — 6 . . . .81 



V. Bibliographical History of Halonia . . . . . . .82 



§ 1. Lindley and Ilutton ......... 82 



a. Halonia 1 tortuosa . . . . . . • .82 



b. — gracilis . . , . . . . .83 



c. — reyulai'is . . . . . • . .83 



2. Richard Brown ......... 83 



3. Unger .......... 84 



4. Dawes ........... 84 



5. Hooker .......... 86 



6. Brongniart .......... 86 



7. Goldenberg .......... 87 



8. Binney .......... 88 



9. Scliiii/per .......... 88 



VI. Description or Specimens of Halonia . . . . . . .89 



§ 1. Specimen No. 34. Halonia regnlaris, PI. XV, figs. 1 — 4 . . . .89 



2. Specimen No. 35. — — PI. XVI, figs. 1—5 . . . .90 



3. Specimen No. 36. — — PI. XVII, fig.s. 1, 2, 3 . . . .92 



4. Specimen No. 37. — — PI. XVII, figs. 4, 5, 6 . . . .93 



5. Specimen No, 38. — — PI. XVIII, fig. 1 . . . . .94 



VII. Concluding Remarks ......... 95 



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