lO Watson, TJie Cone of Bothrodendron vinndtnn. 



the axis. The horizontal portion of the spcrophyll seems 

 to be much more normal, and like that o{ Lcpidostrobns in 

 B. ininutifolimn than in B. vnindinn. 



Finally, the cones of B. iniiuitifoliinn are loncj 

 and cylindrical, differing from the tapering cones of 

 B. viuiidum. 



From these differences it appears certain that BotJiro- 

 dendroji iiiimdum is not B. ini}uttifolium Boulay. It 

 appears likely that B. nuindinn must therefore belong to 

 B. punctatmu, the only other species known as impres- 

 sions from the English Lower Coal Measures (see note).* 

 To this point I shall return in a paper to be shortly 

 published " On the Ulodendroid scar." 



The attribution of the cone described above to 

 BotJu'odendr^on niunduvi (Will.) rests on the following 

 data : — 



1. The wood of the axis of the cone corresponds 



exactly with that of a small twig of />. niundum. 

 This correspondence in structure was noticed by 

 Mr. Maslen whilst cataloguing O454 in the 

 Manchester Museum register. 



2. The horizontal portion of the sporophyll between 



the ligule and the axis corresponding to the leaf 

 base of an ordinary Lepidodendroid stem is 

 much shortened radially when compared with 

 Lepidostrohus, a modification homologous to that 

 of the leaf bases of BotJirodciidron. 



3. The two foregoing arguments are supported by 



constant association of the stems oi Bothrodendron 

 uuindiini and the cones or their sporophylls or 



*It is possible tliat oihei- species of Bothrodendron may occur in the 

 Lower Coal Measures, but B. pitnctaiiun and B. ininutifoliiun are certainly 

 the only common species. 



