PLATE LII. 

 Lepidodbndron Brittsii Lx. 



(Page 188.) 



, 1. Slab covered with brauchlets and leafy twigs. The bifurcation of the branches is seen at 

 several points. U. S. Nat Mus., 5610. 



2. Enlarged detail from lower right of the same slab, showing lower portions of leaves attached 



to the bolsters. Xi. 



3. Portions of the cortex of old trunks, showing the form of the bolsters or leaf cushions; the 



crescentic leaf scars, convex upward, and the corrugation above and below the leaf scar. 

 U. S. Nat. Mus., 6039. 

 3a. Enlarged detail of bolster of the same. The limits of the leaf scar are hardly so clearly 

 defined in the specimen, nor are the appendages so distinct, though they appear to be 

 faintly visible. X2. 



414 



