452 



G. JR. Wieland — Williamsonian Tribe. 



by the Held work of Nathorst, which has added so much to our 

 knowledge of Wiltiamsonia, but by the recent organization of 

 a society for the consecutive study of the region and especially 

 of its fossil plant wealth (2(5). All the more interesting, then, 



Fig. 10. 



Fig. 10. Williamsonia gigas. x 1/2. Two views of a partly conserved 

 bract-enclosed ovulate strobilus partly broken out of matrix traversed by 

 many fronds of " Zamitas gigas." Now adjudged to be fruit and foliage of 

 one and tbe same plant. (Yale — James Yates Collection.) 



becomes the series of fructifications of the Yorkshire coast, 

 shown in figs. 2-12, from both the historical viewpoint and 



