

■!- 





* 



98 D. White — Cretaceous Plants from Martha's Vineyard. 



it corresponds precisely with Heer's original description, in- 

 cluding the transverse striations of the midrib, while the areo- 

 lation is like that given by Lesquereux in his Cretaceous Flora,, 

 pi. xxiii, fig. 6. 



My r sine oorealis Hr., PL II, fig. 5, was described by Heer 

 from the Liriodendron bed (Lower Atane) of Greenland. 



Liriodendron simplex, PL II, fig. 7, was described by New- 

 berry (Bull. Torrey Bot. Club, vol. xiv, 1887, p. 6, pi. lxii, fig. 

 2-4) from the Am boy clays (Middle Cretaceous) of New Jersey 

 and Long Island. Dr. Newberry considers the forms from 

 Greenland identified by Heer as L. Meekii, Leguminosites 

 Marcouanus and Phyllites obcordatus, as the Amboy species. 

 But whether the Greenland forms of L. Meehii are identical 

 with L. simplex, or whether the latter is a Liriodendron at all, 

 are questions which cannot be discussed here, nor do they 

 greatly affect the geological relations of our flora. The Amboy 

 clay L. simplex is identical with the form which is by far most 

 abundant in the Gay Head flora. The leaf represented in fig. 

 6 agrees with the Greenland L. Meehii Hr., which is so abund- 

 ant and characteristic of a horizon in the Lower Atane strata 

 that that part is commonly known as the "Liriodendron bed." 

 Fig. 6 coincides most nearly with Heer's specimen from the 

 Patoot feeds (Upper Cretaceous) of Greenland. It is somewhat 

 donbtful whether Heer's original specimens or his synonyms 

 from the Dakota group of Nebraska are the same species as 

 his Greenland specimens. It is notable that Lesquereux re- 

 garded L. Meehii, Leguminosites Marcouanus and Phyllites 

 obcordatus from Greenland as belonging to L. primcevum of 

 Newberry, from the Dakota group. Either relation is quite 

 possible, especially in view of the known variation in the leaves 

 of a single species, or even tree, of Liriodendron. 



Next to the preceding species, the most numerous of the 

 plants from Gay Head is Eucalyptus Geinitzi Hr., fig. 8-1 i, 

 two of whose fruits, " resembling unopened flowers of syngene- 

 sian plants," were figured as "scales of vegetable remains" in 

 Hitchcock's Final Report. This species, first described from 

 the Liriodendron beds (Middle Cretaceous) of Greenland, i& 

 abundant in and most characteristic of the Middle Cretaceous 

 of Bohemia, and is also present in the same stage (Cenomanian) 

 in Moravia, The specimen, fig. 11, is included here on account 

 of its coincidence with one figured by Yelenovsky (Foss. Fl. 

 bohm. Kreide., iv, pi. xxv, fig. 7), which he supposed repre- 

 sented a flower of this species. It may belong to a conifer. 



The remains of the nuts show longitudinal furrows (white 

 in the figures) filled with a resin which is " indistinguishable 

 by ordinary tests from Amber," and which was observed and 

 pronounced amber by Hitchcock in 1841. These doubtless are 



