

DESCRIPTION OF PLATES. PP. 133 



Fig. 3. The basal portion of an ultimate pinna, 



showing heteromorphous pinnules. 



4. Summit of a compound pinna. 



6. A fragment of a pinna, showing one of the 

 variations of the pinnules. 



Plate XXXIII. 



Figs. 1-4. Alethopteris Virginiana. 



" 1. Pinnules showing what appears to be sori 



at the base of the pinnules. 



" 2. A fragment of the lower portion of a com- 



pound pinna, showing undulate basal 

 pinnules. 



" 3. Summit of a pinna of the normal form. 



" 4. Fragment of a pinna with large pinnules of 



tlie normal form. 



'' 4". Enlarged pinnule of the same. 



5, 6. Alethopteris gigas ? Gein. 



Plate XXXIV. 



Figs. 1-8. Taeniopteris Newberriana, Spec. nov. 



" 1. Portion of a fructified frond. 



" 1". Fructification as seen on the upper surface 



of the frond. 



" 2. Basal portion of a fructified frond. 



" 3. Fragment showing imprints of the inser- 



tions of the sori. 



" 3*. The imprints of the insertions of the sori 



enlarged. 



'" 4, 6, 6. Portions of the sterile frond. 



'' 5". A iDortion of the same enlarged. 



" 7. Basal portion of a frond which is possibly 



fructified higher up. 



" 8. A smaller sterile frond of probably the same 



species. 



" 9-9". Taeniopteris Lescuriana, Spec. nov. Fig. 9 



shows a fragment of one side of the leaf. 



