Manchester Memoirs, Vol. li. (1907), No. 11%. 17 



courtii, Witham, is from the form of its leaf base a 

 LepidopJdoios, so that in this character it is quite distinct 

 from L. Hickii. 



The very slightly projecting protoxylem points of 

 L. Hickii separate it widely from L. Harcourtii, and this 

 separation is also supported by the distinct character of 

 their outer cortices, as has been pointed out above. 





<^> 



/*V 06-' 



Tangential sections of leaf bases of L. Hickii, and a restored view of the 



leaf base, 

 /if— ligule. /«:/-= parichn os. vb avascular bundle. lp = lateral "pits." 



The only characters they have in common seem to be 

 the "double" leaf trace, the usual absence of the middle 

 cortex, and the absence of secondary wood. 



It should be pointed out that the only evidence 

 as to the leaf bases and Halonial branching of L. Har- 

 courtii, Witham, rests on the mistaken identification 

 with L. Hickii, sp. nov. 



The most interesting comparison is that with L. vas- 

 culare. The leaf bases of L. vasculare show it to be a 



