H 



somewhat tumid, small, — and exhibiting a dot-like 

 central mark, — situate in the middle of the fluting, 

 and about five lines remote from each other. 



Longitudinally intervening the scars is a prominent, 

 connecting developement , or rugosity, which assumes 

 more or less of an attenuate , convergent form , as from 

 its middle it approaches the cicatrices. Both integument 

 and interior surface are characterized alike. 



Distribution, in coal formation : — at Anzin, Valen- 

 tia ; in Pennsylvania. 



LEPIDODENDREAE. 



LEPIDODENDRON LINDLEYANUM , UNG. 



linger , Gen. et Spec. j). 256. 



LEPmODENDRON OBOVATUM, 

 Lindl. and Hutt. Foss, Flo, vol, I, pi. 19 bis. p. 63. 



LEPIDODENDRON OBOVATUM, 

 Hugh Miller: — The Testimony of the Rocks, etc. Edinburgh, 

 1857, p. 38, fg. 33. 



SAGENARIA LINDLEYANA , 



Sternb. Vers. II, p. l79. 



Areolae obovate-elliptical ; apex wide and rounded; 

 base attenuate or tapering; central ridge strongly mark- 

 ed, straight or slightly curvilinear, and undivided; scar 

 at the very apex of the areola rhomboidal. 



This scar , last mentioned , is often characterized as 

 approximatively circular in its outline , and is , indeed, 

 more or less so represented by most of the authorities 



