Manchester MevioDS, Vol. hi. (1908), No. J5. 1 1 



megaspores, as described above ; for example, all 

 the sections, about 20 in number, forming the 

 Williamson series of Lcpidodciidron inimdiim 

 also contain these characteristic megaspores. 



In nearly all the sections containing Boihrodeudroit 

 inunduvi in the Manchester Museum and my own 

 collections fabout 30 in number) I have been able to find 

 these spores. 



This series of about 50 sections, shewing the associa- 

 tion of the stems and cones, is derived from 3 horizons in 

 the Millstone Grit and Lower Coal Measures (see Stopes 

 and Watson), and the following localities : — Halifax, 

 Huddersfield, Hough Hill, Shore, Bacup, Cloughfoot, and 

 South-Grain collieries at Dulesgate and Laneshaw Bridge, 

 near Colne. 



Isolated microsporangiate sporophylls of the Bothro- 

 dendron cone have been confused with those of Miadcsmia. 

 This confusion, I believe, arose in the following way : 

 the majority of the specimens of the peculiar "seeds" of 

 Miadcsmia, first described by Miss Benson in the New 

 Phytologist,\\z.vQ. occurred in a few blocks from Cloughfoot 

 Colliery, Dulesgate. These blocks contain fragments of 

 at least three distinct tx'pes of Lycopodiaceous cones. 

 These cones are the cone described above, the cone of 

 Miadcsmia, and another small cone which I hope to 

 describe shortly. 



The isolated sporophylls of Miadcsmia and Bothro- 

 dcndrou agree in the following particulars. They are both 

 Lycopodiaceous cones in which the sporophylls are not 

 greatly radially extended as in Lepidosirobus ; they are 

 very small and delicate and nearly of the same size ; they 

 are both provided with a large and very conspicuous 

 lisfule. 



