84 THE FLORA OF THE AMBOY CLAYS. 
from the Dakota group, neither of which has yet been found in Greenland. 
Hence, until more material shall show the simple, ovate, or lanceolate 
forms to be connected by insensible gradations with others, I must regard 
them as specifically distinct. 
Locality: Woodbridge. 
LIRIODENDROPSIS ANGUSTIFOLIA Newb. n. sp. 
Pl. LIL, fig. 8. 
Liriodendron simplex Newberry, in part, Bull. Torrey Bot. Club, Vol. XIV, 1887, p. 6, 
Pl. LXII, fig. 4. 
Among the elongated leaves that have been credited to Liriodendropsis 
a large number occur in the collection which are well represented by fig. 8. 
They may be surmised to be but varieties of Liriodendropsis simplex, but 
the outline is so different, so narrow and elongated, that it has seemed to me 
improbable that they belonged to the same tree. For the present at least, 
therefore, I have thought it best to consider them representatives of a dis- 
tinct species. In some places the clay is literally packed with them, pre- 
senting essentially the same outlines, and there can be no doubt that if a 
new variety it was a permanent variety and such as deserves to be desig- 
nated by a distinct name. 
Order MENISPERMACE. 
MeNISPERMITES BOREALIS Heer?. 
Pl. L, figs. 1-6. 
Menispermites borealis Heer, Fl. Foss. Arct., Vol. VI, Abth. II, p. 91, Pl. XXXTX, fig. 2. 
Many fragments of leaves have been found which I have been inclined 
to refer to this species. Unfortunately, Professor Heer’s deseription was 
founded upon a single fragment of a large leaf, which failed to give to him 
a clear idea of its outline and structure. It was, however, apparently 
unsymmetrical, and, so far as we can judge from so little material, must 
have been similar in outline and nervation to the leaves figured on Pl. L. 
These are triangular in outline, with the midrib much nearer one side than 
the other, as though one-half of a large cordate leaf had been developed at 
g } 
