DESCRIPTION OF PLATES. PP. 133 



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



showing heteromorphous pinnules. 



" 4. Summit of a comjDOund pinna. 



" 5. A fragment of a pinna, showing one of the 



variations of the pinnules. 



Plate XXXIIL 



Figs. 1-4. Alethoptei'is Virginiana. 



" 1. Pinnules showing what appears to be sori 



at the base of the pinnules. 



" 2. A fragment of the lower jDortion 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 son 



enlarged. 



" 4, 5, 6. Portions of the sterile frond. 



'' 5", A portion 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. 



