STRUCTURE AND AFFINITIES OF LEPIDOSTROBI. 449 



Fig. 3. Vertical slice of lowest scales and sporangia. 



Fig. 4. Horizontal slice of semi diameter of cone through the middle. 



Fig. 5. Vascular tissue of the scales supporting the sporangia. 



Fig. 6. Cellular tissue of ditto, restored from cells in various scales. 



Fig. 7. Cellular tissue comprising the walls of one of the sporangia. 



Fig. 8. Ideal representation of a horizontal section of a restored cone, 

 showing eight scales, radiating round, and inserted into the axis, each 

 bearing a sporangium. 



Fig. 9. Ideal representation of a vertical section of two sporangia and 

 their supporting scales, the latter traversed by vascular tissue. 



Plate 8, Fig. 1. Fragment of a cone of Lepidostrobus ornatus, in 

 which the apices of the scales are admirably preserved. Specimen from 

 Mr. Beckett of Wolverhampton. 



Fig. 2. Apices of scales of ditto magnified. 



Fig. 3. Upper extremity of a Lepidostrobus from which the apices of 

 the scales are removed. In the collection of Miss Jukes, of Birmingham. 



Fig. 4. Vertical section of the same, showing that the axis has fallen 

 away, as also the apices of the scales. 



Fig. 5. Magnified view of the fractured terminations of the scales, 

 each with a prominence in its hollow, which is the projecting bundle of 

 vascular tissue, shown at fig. 11 a. 



Fig. 6. Portion from another specimen of L. ornatus, showing the 

 union of the walls of the sporangium c, with the scale d, at the point b ; 

 c is the vascular axis of the scale. 



Fig. 7. More highly magnified portions of fig. 6, showing the dispo- 

 sition of the cells at the junction of the walls of the sporangium, c, with 

 the scale, d. At letter a is seen the vascular tissue of the latter, and at 

 e an escaped spore. 



Fig. 8. Vertical slice of another Lepidostrobus ornatus. 



Fig. 9. Mutilated apex of ditto, with spores escaped and mineralized 

 in a transparent medium. 



Fig. 10. Spores from the same, some of them broken up into their 

 component sporules. 



Fig. 11. Restored view of axis of cone, x, with two supporting scales, 

 b, transversed by vascular tissue, a, the lower one bearing a sporangium, 

 s, with its contained spores. The apices of the scales are represented 

 broken off, as at figs. 3, 4, and 5, but restored by dotted lines, as in 

 figs. 1 and 2. 



Fig. 12. Fragment of Lepidodendron elegans, preserved in iron-stone, 

 without any material compression, and hence showing the surface scars 

 as prominent bodies. It is in the collection of Mr. Cooper, of Bilston, 

 who procured it near that town. 



Plate 9, Fig. 1. Specimen of Lepidodendron elegans in the cabinet of 



