68 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Apr. 28, 



had been violently broken off. These are the only beds containing 

 erect trees that I have observed in the lower coal-measures ; and one 

 of them was observed for the first time in 1857. 



Pigs. 1, 2, 3. — Surface-marhiTigs of Lepidodendra from the Lower 

 Coal-measures of Nova Scotia. 



Fig. 1 a. 



Fig. 2 a. 



Fig. 1 a. Lepidodendron elegans. 



Fig. 1 h. Areole and leaf-scar. 



Fig. 2 a. Lepidodendron corrugatum. 



Fig. 2 b. Areole and leaf-scar. 



Fig. 3 a. Lepidodendron Sternbergii. 



Fig. 3 b. Areole and leaf -scar. 



A second species, rather less abundant, is closely allied to Lepido- 

 dendron elegans, though a comparison of specimens of different sizes 

 induces me to believe it distinct. It is distinguished by elongated 

 ovate areoles, having small triangular leaf-scars. The adjacent 

 areoles are usually separated by a space of regularly corrugated bark, 

 equal to their own transverse diameters. The principal wrinkles are 

 longitudinal ; but there is a delicate transverse series, perceptible 

 only in the best specimens. From this character, which can be 

 observed even when the scars are not distinctly preserved, I have 

 provisionally named the species L. corrugatum. The decorticated 

 surface of well-preserved specimens of this species presents prominent 

 scars, with the intervening spaces very delicately corrugated trans- 

 versely. 



A third species, still less abundant, has broadly rhomboidal 

 areoles, with rhombic scars, each having three vascular punctures. 

 This species may be L. Sternbergii, though I have seen no figure or 

 description of that species giving the minute characters of the scars 

 (see figs. 1, 2, 3, and la, 2a, and Sa). It resembles that figured by 

 I)r. Jackson as L. dilatatum, from the All^rt Mine. 



