534 MR ROBERT KIDSTON ON 



1855-1862. Goldenberg. Flora SarceponL foss. 



Lepidophloios. Lief. i. p. 20, 1855. 

 Halonia. Lief. i. p. 20, 1855. 



Lomatophloyos. Lief. i. p. 22, 1855 ; Lief. iii. p. 25, 1862. 

 Goldenberg regarded these three genera as distinct, believing that the evidence 

 on which they had been united was not conclusive. He refers Artisia approximata and 

 Artisia distans to Lomatophloios crassicaule as its pith- cylinder. 



He figures some most interesting specimens, which will be referred to again more fully. 



1859. Goppert. Foss. Flora d. Silur. Devon, u. unter Kohlenf., p. 105. 

 Halonia is here treated as a separate genus. 



1860. Eichwald. Lethcca Rossica, Lepidophloios, vol. i. p. 156; Halonia, p. 148. 



Eichwald regarded Lepidophloios and Halonia as distinct genera. He figures some 

 interesting specimens of Halonia tuberculata, Brongt., on his pi. xi. figs. 1-4, but of 

 these his figs. 1, 2 are the most instructive. Fig. 1 shows a bifurcation of a Halonian 

 branch, which shows the usual characters, but the impression on the matrix, a small 

 portion of which is exhibited by the removal of the stem, shows the Lepidophloios 

 leaf-scars. Owing to the absence of enlarged details, the species of Lepidophloios to 

 which this Halonian branch belongs cannot be determined. But the evidence these two 

 specimens afford is clearly in favour of the opinion that Halonia is the fruiting branch of 

 Lepidophloios. 



1868. Dawson, Lepidophloios. Acadian Geology, 2nd. ed., p. 454. 



It may be best to quote Dawson's own words here — 



" Lepidophloios. — Under this generic name, established by Sternberg, I propose to 

 include those Lycopodiaceous trees of the Coal Measures which have thick branches, 

 transversely elongated leaf-scars, each with three vascular points, and placed on elevated 

 or scale-like protuberances, long one-nerved leaves, and large lateral strobiles in vertical 

 rows, or spirally disposed. Their structure resembling that of Lepidodendron, consisting 

 of a Sternbergia pith, a slender axis of long scalariform vessels, giving off from its surface 

 bundles of smaller vessels to the leaves, a very thick cellular bark, and a thin dense 

 outer bark, having some elongated cells or bast tissue on its inner side." 



" Regarding L. laricinum of Sternberg as the type of the genus, and taking in 

 connection with this the species described by Goldenberg, and my own observations on 

 numerous specimens found in Nova Scotia, I have no doubt that Lomatophloios 

 crassicaule of Corda, and other species of that genus described by Goldenberg, 

 Ulodendron and Bothrodendron of Lindley, Lepidodendron ornatissimum of Brongniart, 

 and Halonia punctata of Geinitz, all belong to this genus, and differ from each other 

 only in conditions of growth and preservation. Several of the species of Lepidostrobus 

 and Lepidophyllum also belong to Lepidophloios." 



