DESCRIPTION OF PLATES. 



Plate I. 



Figs. 1-4. Eqiiisetides elongatus, Spec. nov. 



" 1. Equisetides elongcatus. A large fragment. 



'' 1". Enlarged rib of same to show mid-nerve. 



" 2. Equisetides elongatus, a smaller and more slender 



specimen. 



*' 3. The same. A specimen showing what is prob- 



ably the base of the sheath. 



" 4. The same. A specimen showing the inser- 



tion of sheath. 



" 5. Equisetides striatus, Spec. nov. 



'* 6. Equisetides rugosus, Schimp, 



" 7. Sphenophyllum densifoliatum, Spec. nov. 



" 7". A pair of leaflets of the same enlarged. 



" 8. Sphenophyllum filiculmis, Lesqx. 



" 8". Leaflet of the same enlarged. 



" 9. Sphenophyllum tenuifolium, Spec. nov. 



" 9". Leaflet of the same enlarged. 



" 10-11. Sphenophyllum latifolium, Spec. nov. 



"■ 10. Sphenophyllum latifolium. Specimen showing 

 the toothed and irregular terminal border. 



** 10". A leaflet of the same enlarged. 



" 11. The same, with the terminations of the leaf- 



lets wanting. 



Plate IL 



Figs. 1-5. Nematophyllum angustum, Gen. nov. et spec, 

 nov. 



(121 PP.) 



