PLATE VI. 



Eremopteris missoxtriensis Lx. 



(PageXe.) 



Fn;. 1. Sections of parallel pinnit, showing tlie form aud proportions of tlie ultimate piuuie and 

 pinnules. U. S. Nat. Mus., 56.57. 

 la. Enlarg-ed detail of pinnules from same slab. x2. 



322 



