GENERAL REMARKS. 



123 



Fossil Plants from the Older Mesozoic of North Carolina — Continued. 



From this list we see that thirty-nine species, omitting the Bambusium, 

 may be determined, with some degree of reliability, from the Mesozoic of 

 North Carolina. An analysis of the list shows that nine species are peculiar 

 to North Carolina, and have no very near allies in other countries. Fifteen 

 species are found in the Virginia Mesozoic, and one is closely allied to a 

 Virginia plant, for the Lonchopteris ollongus may really be identical with 

 L. Virginiensis. Assuming, with Feistmantel, that the Rajmahal Group 

 of India is of Liassic age, we have two species identical with, and six 

 nearly allied to Jurassic plants, while seven species are identical with, 

 and eight closely allied to Rhaetic plants. If we put these relation- 

 ships in the form of percentages, we find that 23 per cent, of the plants 

 are peculiar to North Carolina, 41 per cent, are found in Virginia, 20 

 per cent, are allied to, or identical with Jurassic forms, while the number 

 of forms identical with, or allied to Rhsetic plants amounts to 38 per cent. 

 Among the species allied to, or identical with Virginia plants we have 

 some of the most abundant and characteristic species, such as Equisetum 

 Bogersi, Macrotceniopteris magnifolia, Acrostichides linncecefolius, A. rhombifo- 

 lius, Mertensides bullatus, Baiera multifida, &c. Judging, then, from the evi- 



