PLATE CLXXXIX. 



MaKIoPTKKIS KKK.MOl'TKHOJDES 1 >. W. 



(Page 872.) 



Fi<r. 1. Portion of slab containing segment of raehis, sliowinj: lateral fomjwnnd 



jjinnae. Lykehs coal No. 5, Brookside colliery. 

 Fijr. 2. Fratinient in which the pinnules are more deeply dissected ami tlattened. 



From the same locality. 

 Fig. 3. Fragment from the large lateral pinna> shown in fig. 1. 

 Fig. 3'( Pinnule of the same specimen enlarged to show the nervation. Twice the 



natural size. 



Lover LiikrtiK (lirisloii — Loxrr zone. 



Nel'koitickis Pocajioxtas I). W. 



(Page 888.) 



Fig. 4. Specimen showing the characteristic form and development of the pinnules 

 of this species. From the roof of the Pocahontas coal near Crozens, in 

 the Great Flat Top coal field, West Virginia. 



Fig. 4'^ Pinnule of the same specimen enlarged to show the nervation. Twice the 

 natural size. 



Aije of tin' Loirrr Lykrvs (Ik'isioii. 



Neihoi'tkris Pocahontas var. pextias D. W. 



(PageSiVi.i 



F'ig. o. rppcr pimiic and succeeding sublobate ]iiniiulcs. Fnini the roof nf Lykens 



coals 5 or (i at the Brookside colliery. 

 Fig. 'vi. Sublobate pinnule, enlarged to show close, relatively i>aralk'I nervation. 



Three times the natural size. 

 Fit:. -i/'. Fragment from the lamina of the same jnnnule. I'jilarLred to illustrate the 



interneural striation. 



Lower Li/ktns (lirision — Loirer zone. 

 922 



