Frof. E. W. Claypole — Fos,sil Tree from the U. Silurian. 561 





Lepidodendron. 



Sigillaria. 



Carboniferous. 



60 sp.i 



60 sp.i 





13 sp. 







L. costatum, Lesq. 







„ corrugatum, Dawson. 



2 





,, radioplicatum, Dawson. 







„ aculeatum, Stern. 







,, forulatum, Lesq, 





Sub- or Lower Carbon- 



„ obscunmi, Lesq. 





iferous * 



„ VelfJieimianum, Stern. 

 ,, scobinifonne, Meek. 

 „ tetragonum, Stern. ^ 

 „ Sternbergi, L. & H. 

 „ diplostegioides, Lesq. 

 „ turbinaturn, Lesq. 





'. 



,, IVorthenanum, Lesq. 





CatskiU 



„ Gaspianum, Dawson 



8. simpKcitas 



Chemung j 



„ Chemungense 

 ,, Vamixemi 



4 



Hamilton 



„ primmvum 



8. palpebra 



Corniferous 







Oriskany 







Lower Helderberg 







Onondaga 







Niagara 







Clinton 



Glyptodendron Eatonense ^ 





Oneida Conglomerate 







Hudson Eiver (Cincinnati) 







Lower Silurian 







have yet been annonnced from the American Silurian or older rocks, 

 in spite of their immense extent. 



A specimen was, however, described by Lesquereux in 1874 

 ("American Journal of Science," January) as a land-plant allied to 

 Sigillaria. It was found near Lebanon, Ohio, about 35 miles north- 

 east of Cincinnati, and was thought to show faint traces of spiral 

 mai'ks, like those upon the stem of Lepidodendron or Sigillaria. Mr. 

 Lesquereux remarks of the specimens (for there were two species) : 



"They were fragments of small stems or branches, one about two 

 inches thick, cylindrical, the whole substance transformed into soft 

 grey clay, the bark or outer surface only distinctly moulded into 

 clay, and marked by rhomboidal continuous {sic : contiguous ?) 

 enlarged bolsters, surrounding the stem in a spiral, bearing at the 

 middle a small oval or rhomboidal scar, less distinct, though well 

 recognizable, and presenting the character of stems of Sigillaria 

 Menardi, Br., or of Sigillaria Serli, Br." 



Professor Newberry, remarking in the August number of the 



1 See Miller's " American Palteozoic Fossils." 



2 8. Lorwoyana, given in the above-quoted Catalogue as "Lower Carboniferous," 

 is from the Middle Carboniferous or Coal-measures of Cape Breton. See Dawson's 

 Eeport, 1873. 



■* This species is omitted in the above Catalogue, but see Dawson's Eeport, 1873. 



* 8. Chemungensis, of the same Catalogue, is a synonym for L. Chemungense. 



* Placed in this column to save space. This position is not inconsistent with the 

 affinity of the species. 



DECADE II. — VOL. T. — NO. XII. 



36 



