DESCRIPTION OF SPECIES. 129 
Only one specimen of this interesting plant has yet been found in the 
Amboy Clays. It differs from the species described by Lesquereux from 
the Dakota group of. the West (Protophyllum Sternbergii, P. multinerve, P. 
rugosum, etc.) in the simplicity of its outlines—as all the other species have 
undulate or dentate margins—and in its obovate form. The character of 
the base is, however, such as distinctly to bring it within the genus, and it 
indicates that this feature, so striking in the flora of the Dakota, was not 
wanting on the eastern shore of the continent during the deposition of the 
Amboy Clays. 
The relations of Protophyllum to the flora of the present day have 
never been satisfactorily determined, but I would suggest that the leaves 
of some species of Coccoloba are very closely allied, both in form and 
structure, to those of Protophyllum. 
Locality: Woodbridge. 
DEWALQUEA GRONLANDICA Heer?. 
Pl. XLI, figs. 2, 3, 12. 
Dewalquea groénlandica Heer, Fl. Foss. Arct., Vol. VI, Abth. II, p. 87, Pl. XXIX, figs. 
TSE 19; PI eXn ies O56; El XIV, tig 1s, Vol; Vil, p. 37, Pl. mxXil. 
figs. 5, 6. 
By comparison of our specimens with the figures represented by Heer 
in Flora Fossilis Arctica, Vol. VII, Pl. LXII, figs. 5, 6, under the above 
name, there seems to be but little doubt that the two are identical and that 
we are warranted in provisionally referring them to the same species. 
No indication was given by Dr. Newberry as to his ideas concerning 
the probable affinities of these leaves, nor was there any memorandum in 
regard to locality.—A. H. 
DEWALQUEA TRIFOLIATA Newb. n. sp." 
Pl. XXII, figs. 4-7. 
Leaves in threes, springing from the same base, lance-linear, wedge- 
shaped at base, margins entire, summits unknown. 
'The two-leayed form shown at fig. 7 was not named by Dr. Newberry, although grouped with 
the other figures. I am unable to determine whether he intended to regard it as a distinct species, 
and have included it provisionally with the others.—A. H. 
MON XXVI 9 
