PSILOPHYTON, ISOETITES. 193 



of the point of insertion of the leaves ; it would be important to know 

 whether this was surrounded or not by scale-leaves, as is the case in the 

 Conifers just mentioned. Though I have gone through the rich stores in 

 the Museums of London, Oxford and Scarborough, I have unfortunately 

 never succeeded in finding a single tuft of leaves with a distinct and well- 

 preserved base. A second form also found near Scarborough and placed 

 with Isoeteae is Solenites furcatus \ unfortunately known only from some 

 scanty remains in not too good a state of preservation. In this spec : es the 

 linear leaves, which are only found singly, are repeatedly and dichotomously 

 branched, and thus have a still greater resemblance to Czekanowskia. The 

 suspicion of a nearer affinity between the two forms is strengthened by the 

 circumstance that both alike belong to the Lower Oolite formation. 



1 Lindley and Hutton (1), vol. iii, p. 209. 



