PART II. 



I. Introductory Remarks. 



In this Monograph it was originally intended to have described a series of fossil 

 Stems, showing structure, from the Coal-measures ; and the genus Calamodendron was first 

 taken as yielding, from specimens in my possession, more complete materials, not only for 

 illustrating the structure of the stem, but also of the organs of fructification. Before 

 proceeding to describe the structure of more stems, it has been considered desirable to 

 bring before the Public some specimens showing Organs of Fructification. These are not 

 very numerous, but their publication may be of use in indicating how small the amount 

 of knowledge on the subject we really possess as yet, and in directing the attention of 

 Collectors to the matter ; for a great deal of labour is undoubtedly yet required before we 

 shall be able thoroughly to understand the true nature of some of our commonest Coal 

 Plants, so as to restore them in all their parts. 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, probably, it ought to have been 

 delayed to a later portion of the Monograph. 



II. Bibliographical History of Lepidostrobus and Tlemingites, with Remarks on 

 their Relationship with Lepidodendron, Sigillaria, &c. 



§ 1 . General Remarks. — The genera Lepidodendron, Lepidostrobus, and Flemingites, 

 especially the two former, have been often described, in most works that have treated on 

 Fossil Botany. The specimens figured have been for the most part mere casts and im- 

 pressions, not showing any trace of internal structure. Those instances where the tissues 

 of the plant happened to be well preserved, or where the organs of fructification distinctly 

 showed their spores, have not been numerous and are soon given. 



The specimen of Lepidodendron Harcourtii found by the Rev. C. G. W. Harcourt, 

 Rector of Rothbury, and preserved by Professor John Phillips, afforded materials for the 



