SYNOPSIS OF THE FLORA. 281 



correctly identified, ma.j possibly have been derived from a terrane of upper 

 Pottsville age. In any case, it can avail little to attempt to utilize for cor- 

 relation the species listed by Hambach, since not only are we left in igno- 

 rance, except as we may gain some idea from a general geologic map, as 

 to which of the three divisions of the Coal Measures an}' of the specimens 

 outside of Henry County came from, but we are also furnished no other 

 geographic localization than the bare name of tlie county in \vhich the 

 various species are said to have been found. 



For the reasons given above, little if any weight will be attached to or 

 use made of the few additional species said to have been found in the Coal 

 Measures of Missouri, but which have not been seen in any of the collections 

 to which I have had access. 



EVIDEJ^CE OF THE FOSSIL PLAjSTTS AS TO AGE AST) EQUITALE]SrCE 

 OF THE TERRANES. 



Preliminary to an attempt to ascertain the stratigraphic significance of 

 the floras of the Lower Coal Measures of Missouri, it will be necessary first 

 to take into consideration the general character or facies of the combined 

 flora; to review the vertical distribution of the species and diff'erentiate 

 those possessing, so far as is known, special correlative value, and to con- 

 sider some of the relationships, and the consequent implied chronologic 

 data, of some of the forms made known in this report. This accomplished, 

 we may proceed to the comparison, with special reference to the contempo- 

 raneities indicated by the vegetable remains, of the Lower Coal Measures 

 of Missouri (1) with sections of the Carboniferous in other portions of the 

 eastern United States and (2) with several of the sections of the Carbonif- 

 erous group in the Old World. 



SYNOPSIS OF THE FLORA. 



In the consideration of the relationships of the jjlants from the Lower 

 Coal Measures of Missouri and their occurrence in other regions I shall 

 exclude the few reported-' species of which I have not seen specimens, 

 limiting my discussion to the species examined by myself, and recording 

 only such disti'ibution of these species as is based on personal observations. 



To obtain a comprehensive view of the plants treated in the foregoing 



' Euuuierated in the preceding sections. 



