66 THE RARITAN FLORA. 



Possibly the Raritan material should be correlated with the 

 genus Cladophlehis, which is so abundant in the older formations 

 of the Potomac Group, but until decisive material comes to light 

 Professor Newberry's determination should stand. 



Occurrence. — Woodbridge. 



Collections. — ^N. Y. Botanical Garden. 



Gleichenia micromera Heer. 



Gleichenia micromera Heer, Fl. Foss. Arct. vol. 3, ab. 2: 55, pL 

 10, f. 14, 15, 1874. 

 Newb., Fl. Amboy Clays, 36, pi. 3, f. 6, 1896 ( ?). 



Description. — "Gl. fronde bipinnata, rachi tenui, pinnis valde 

 approximatis, patentissimis, linearibus, pinnulis minutis, hori- 

 zontalibus, liberis, ovatis, basi utrinque rotundatis, apice obtusis, 

 nervis secundariis simplicibus." Heer, 1874. 



Like the two preceding species this is also based on frag- 

 mentary specimens. These are of a delicate fern with narrow 

 linear right angled pinnules of very small size which agree 

 exactly with the type material. 



This species was described originally from the Kome beds of 

 Greenland, which are correlated with the Urgonian of Europe, 

 but this offers no obstacle to its occurrence in the New Jersey 

 Raritan since characteristic specimens of other species of this 

 genus show an equal range. 



Occurrence. — Sayreville, Milltown. 



Collections. — N. Y. Botanical Garden. 



Family CYATHEACE^. 



Genus BflCKSONIA Presl. 

 (Pterid., 1836, p. 135.) 



DiCKSONIA GROENLANDICA Heer. 



Plate IV, Fig. i. 



Dicksonia groenlandica Heer, Fl. Foss. Arct., vol. 6. ab. 2 : 23, 

 pi. ?5, /. .8, 9, 1882. Ibid., vol. 7 : 2, pi. 48, f. 1-3, 1883. 

 Berry, Bull. Torrey Club, vol. 36: 245, 1909. 



