PLATE LXIX. 



SiGILLARIA CAMPTOT^NIA Wood. 

 (Page 230.) 



Part (if a slab, iu the lower part of which is a portion of a flattened trunk. The impressLou of 

 the back side of the trunk is continued to the top of the slab. Between the subepidermal casts of 

 the leaf scars are seen the diagonal systems of cross-striation of the cortex characteristic of the 

 Suhsiffillariw. V. S. Xat. Mus., 6057. 



448 



