OF LOWER GEEEN8AND PLANTS. 



103 



as if they had ray-tracheids of relatively small size like those in 

 our wood. Comparison with P. amethystlnum, Knowlton, is 

 also impossible for want of the essential data in this species. 



Among the described fossils of Piti/oxf/lon-type, one may 

 compare this specimen to some extent with that described by 



Text-fig. 25. Pi nits monficola, living species, for comparison with Pity- 

 oxylon Sewardi. Radial section of a medullary ray showing 

 tracheids, tr., parenchyma, p., and interspersed bands of tracheids, itr. 



Goeppert and "Menge (1883) as Pinites stroboides (see particularly 

 pi. x, fig. 71), though the agreement between our fossil and that 

 from the amber is not so exact as that between it and the living 

 P. itioiiticolii. 



