PLATE VII. 



Lepidodendron Harcoiirtii, L. and H. 



Fig. 1 (No. 17). The imperfect Cone from the Upper Foot seam of Coal, neai' 

 Oldham, as it appeared before it was sliced. Natural size. 



Fig. 2. A transverse section. Natural size. 



Fig. 3. A longitudinal section. Natural size. 



Fig. 4. A transverse section (fig. 2). Magnified 2 diameters. 



Fig. 5. A transverse section of the pith and vascular cjdinder. Magnified 45 

 diameters. 



Fig. C (No. 18). A transverse section of the pith and vascular cylinder of Lepidoden- 

 dron Harcoiirtii, from the Dudley Coal-field. Magnified 10 diameters. 



Fig. 7 (No. 17). A transverse section of a single Sporangimu, full of Microspores. 

 Magnified 5 diameters. 



Fig. S. A longitudinal section of a single Sporangium, with a Scale or Bract. Mag- 

 nified 4j diameters. 



Fig. 9. A longitudinal section of the pith and vascular cylinder. Magnified 45 

 diameters. 



Fig. 10. A group of Microspores (converted into a substance resendiling 

 paraftine), and a portion of the wall of the Sporangium containing them. Magnified 50 

 diameters. 



