PLATE XI. 
Page. 
Fig. !. Alethopteris spi.wlosa, Spec, nov.396 
Fig 2. Enlarged pinnules of the same, showing nervation. 
Fig. 3. Adetiioptkius falcata, Spec, nov. 396 
Fig. 4. Pinnule of the same, showing nervation. 
Fig. 3. Alkthopteris solida, Sp.ee. nov.. . ..897 
Fig. 6. Pinnule of the same, with group of sporanges. 
Fig. 7. Group of sporanges, much enlarged. 
