xv] 



SPENCERITES 



193 



is that originally described by Williamson', from the Lower 

 Coal-Measures of Yorkshire, as a type of Lepidostrobus, L. in- 

 signis, but afterwards'' more fully investigated and assigned to 

 a new genus by Scott'. It should be pointed out that in a 

 later publication Williamson spoke of the lycopodiaceous axis, 



Fig. 192. Spencerites insignis (Williamson). (After Miss Berridge.) 



■which he suspected might belong to his L. insignis, as possibly 

 worthy of recognition as a distinct generic type. 



Of the two species included by Scott in his genus Spencerites 

 only one, S. insignis, need be considered. Since the publica- 



1 Williamson (78) A. p. 340, PI. xxii. See also the drawings in Williamson's 

 later papers quoted in the synonymy. 



2 Williamson (93^). Scott, D. H. (98). 



