298 D. WHITE — AGE OF LOWER COALS OF HENRY CO., MISSOURI. 



Distribution of the identical or closely related Species, etcetera — Continued. 



Name of species. 

 (Related species in parentheses.) 



Lepidodendron brittsii, Lx. 



(L. wortheni, Lx.). . . . 



L. lanceolatum, Lx 



L. rimosum, Stb 



L. scutatum, Lx. 



(L. ophiurus, Brongn. ) 



Lepidostrobus princeps, Lx. 



(L. geinitzii, Schimp.) 



Lepidophyllum, sp nov.* 



(L. triangulare, Zeill.) 



Sigillaria camptotsenia, Wood . 



S. tessellata, (Steinh. ) Brongn 



S. ovata, Sauv 



Stigmaria verrucosa (Martin) Mill 



S. evenii, Lx , 



Cordaites communis, Lx. 



(C. borassifolius, (Stb.) Ung.). ... 

 Cordaianthns ovatus, Lx. 



(C. volkmanni, (Ett. ) Zeill.) , 



Rhabdocarpos multistriatus (Presl.) Lx, 

 Paleeoxyris appendicuiata, Lx. 



(P. carbonaria, Schimp.) 



Upper Carboniferous. 



60 

 CD 

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02 



S 



Summary.. 



J Identical species 34 



\ Related species 34 



+ 



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+ 



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12 



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22 

 21 



02 

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CD 



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14 

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25 



18 



tion. Through its Sphenopteroid elements it is intimately connected 

 with the Middle Coal Measures ; but in England as well as in America 

 the progression from the lower to the higher terranes of the earlier Coal 

 Measures proper is in general marked by the appearance and elabora- 

 tion of the Pecopteroid forms simultaneously with the disappearance of 

 the earty Mariopteroid and Pseudopecopteroid forms of the basal Coal 

 Measures, or such as have survived from the " Millstone Grit " or the 

 Pottsville series. It is largely to the proportion of identical or related 

 species * of Pecopteris and the intimately connected Aplilebix that the ap- 



* Although but slight weight should be attached to the evidence afforded by the related species, 

 their testimony in this as well as in the following table seems practically to corroborate that of 

 the identical species. 



