45 S Appendix. 



and cannel seam above. Four main roots appeared to have 

 proceeded from the base, but only one has been preserved entire 

 and lodged in the museum of the Manchester Geological Society. 

 This, after proceeding some distance, divides into two roots, and 

 each of these latter into two more, which run in a horizontal 

 direction as Stigmaria, at a depth of two feet under the coal. 

 Their extremities have not been reached, although they were 

 traced upwards of twenty feet' 



Page 194. 'We are at present in want of a correct vertical 

 section of the earth's crust, showing the materials composing 

 its various beds, and the nature of their organic remains. 

 When this is supplied, we shall be enabled to trace back the 

 physical history of our globe, and furnish the mathematician with 

 data from which to calculate, with absolute certainty, the changes 

 which have taken place in the solid particles of our planet, and to 

 determine whether some of the most important of them have not 

 been effected by the slow and silent process of the radiation of 

 heat, rather than by more actively energetic causes.' 



Carboniferous Flora. Part II, Observations on the Structure of 

 Fossil Plants found in the Carboniferous Strata. Memoirs of 

 the Palceo7itographical Society^ 187 1. This treats of Lepido- 

 dendron^ Lepido strobus^ and Flemingites with their relation to 

 Sigillaria. 



Page 33. ' . . . One good specimen showing the organs of 

 fructification connected with the stem and foliage of the plant is 

 worth any number of detached fragments. It has been my good 

 fortune to become possessed of a specimen showing such three 

 portions of a plant ; and therefore it has occurred to me that no 

 time should be lost in describing it, although in due order, prob- 

 ably, it ought to have been delayed to a later portion of the 

 monograph.' 



Page 60. ' . . . This monograph, no doubt the reader will have 

 perceived, was intended to be of a descriptive character rather 

 than an attempt to trace the analogy of those plants, the 

 remains of which have formed our valuable beds of coal, with 

 living vegetables. My endeavours have been to collect materials 



