w 



canadian fossils. 

 Genus Leptophleum — Dn. 



46. Leptophleum rhombicum, Dn, — (PI. VIII, Figs. 88, 89.)— J. G. 



S., XVIII, 316, PI. XII, Fig. 8 ; and XVII, Fig. 53. Ibid. XIX, 

 462, PI. XVIII, Fig. 19.— M.D., Perrj?, Maine. M.D., Gaspd. 



" Stem covered with contiguous rhombic areolea, each with a single small 

 scar a little above its centre, and above this a very slight furrow. 

 Decorticated stems with spiral punctiform scars in slight depres- 

 sions. Bark thin. Pith-cylinder very large, with transverse 

 markings of the character of Steriibergia." 



I figure a very well marked specimen of this curious species, shewing 

 the external markings and the internal Sternbergia structure. 



Genus Lepidophloios — Sternb. 



47. Lepidophloios antiquus, S. N.— (PI. Vil, Figs. 90, 91.)— M.D., 



Gasp^. 



Areolet vert/ small, lets than half a line in length, apparently rounded below and 



pointed above, loith acuminate ends. Central scar indistinct, lateral ones 



apparently obsolete. Projections below the areoles marked with sharp 



vertical ridges, 



t 



I have had occasion to remark in previous papers the fact that the Lepi- 

 dodendra and Sigillarice of the Devonian are for the most part slender 

 and delicate in their habit of growth, as compared with those of the Car- 

 boniferous and specially of the Upper Coal formation. The present species 

 exibits the same peculiarity in the genus Lepidophloios, usually so large and 

 coarse in its areolation. Species like that above described are referred by 

 some palaeo-botanists to the genus Sigillaria, but the internal structure of 

 the best known species shows that they were lycopodiaceous plants allied 

 to Lepidodendron and bearing Lepidostrobi. They have no connection 

 with Sigillaria, other than a superficial resemblance in the form of the 

 : areoles. Of the present species I have found only one well-characterized 

 specimen, that figured (Fig. 90). It is about one inch in diameter, and 

 its areoles are well preserved only on a small portion of the surface. It 

 shows no trace of marks of cones, and was probably a young stem or 

 branch. 



Leaves, apparently of a very small species of Lepidophloios are found 

 rarely in the shales of St. John- They may possibly belong to the present 

 species. >^ 



