542 



THE DEVONIAN PERIOD. 



long and slender, bifurcating rarely, and, unless they were very woody, 

 must have been pendent or decumbent. No large trunks have been 

 seen. It was a widely distributed and abundant species in the Upper 

 and Middle Devonian periods. The plant figured by Professor Rogers 

 in the " Report on Pennsylvania," p. 829, fig. 677, can scarcely belong 

 to any other than this species ; and it is also figured in Vanuxem's 

 " Report on New York," p. 191, fig. 55, and p. 157, fig. 38. 



Fig. 189. — Lepidodendron and Psilophyton. 



A, Lepidodendron Gaspianum. 



B, C, Psilophyton elegans. 



Lycopodites 3Iattkeivi, Dn. (Fig. 188, C). " Canad. Nat.," vol. 

 vi. p. 171, fig. 8. Leaflets one- veined, nan-owly ovate-acu- 

 minate, one-tenth to one-fourth of an inch in length, somewhat 

 loosely placed on a very slender stem, apparently in a pentasti- 

 chous manner. This species was described from specimens found 



