Tin; DF.VONIAN. 



71 



from the ricli plant-l)eariiig beds near 8t Jolin, New Brunswick, so 

 admirably explored by Messrs llartt and Matthew. It is proper, 

 however, to explain that, in Acadian Geology, I have restricted 

 myself to these species, not noticing, except incidentally, those from 

 the Devonian of Gaspe, New York, etc. It is also to be observed that 

 several of tlie species mentioned in that work are much more fully 

 Fig. 12. — rsilopliyton princ.cpa. — Restored. 



«, I'niit, natural size; h, Stem, nutiiral size; c, Scalariform tissue of the axis, ln'j;hl\- magnified 

 In tlie restoration, one side is represented in vernation, and the other in I'riiit. 



illustrated and described in the Report above referred to. ^lorc especi- 

 ally is this the case with the remarkable genus Psilophi/ton, the fructifi- 

 cation of wliich was not distinctly known when my last edition was 

 puljlishcd, but will be found fiiUv described and tignred in the 



