372 THE CANADIAN NATURALIST. [June 



the case with L. Pictoense. The cracking of the bark no doubt 

 occurs in very old trunks of the first two types, but not at all to 

 the same extent. 



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Genus Lepidophloios. — Under this generic name, established 

 by Sternberg, I propose to include those Lycopodiaceous trees of 

 the Coal measures which have thick branches, transversely elon- 

 gated 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 resembles that of Lepidodendron, consisting of a 

 Sternbergia pith, a slender axis of large 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. Larlcinum of Sternberg as the type of the genus, 

 and taking in connexion with this the species described by Golden- 

 berg, and my own observations on numerous specimens found in 

 Nova Scotia, I have no doubt that Lomatophloios crassicaulis 

 of Corda and other species of that genus described by Golden- 

 berg, L. Ulodendron and L. Botlirodendron of Lindley, Lepido- 

 dendron ornatissimum of Brongniart, and Hcdonia 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. 



The species of Lepidophloios are readily distinguished from 

 Lepidodendron by the form of the areoles, and by the round scars 

 on the stem, which usually mark the insertion of the strobiles, 

 though in barren stems they may also have produced branches ; 

 still the fact of my finding the strobiles in situ in one instance, 

 the accurate resemblance which the scars bear to those left by the 

 cones of the Red Pine when borne on thick branches, and the 

 actual impressions of the radiating scales in some specimens, leave 

 no doubt in my mind that they are usually the marks of cones ; 

 and the great size of the cones of Lepidophloios accords with 

 this conclusion. 



The species of Lepidophloios are numerous, and individuals are 

 quite abundant in the Coal formation, especially toward its upper 

 part. Their flattened bark is frequent in the coal-beds, and their 

 roofs, affording a thin layer of pure coal, which sometimes shows 

 the peculiar laminated or scaly character of the bark when other 



