BERRY: MEsozoIc FLORA OF ATLANTIC COASTAL PLAIN 409 
has yielded a large and diverse flora in New Jersey, the bulk of 
which comes from the clay beds of the Amboy district in Middlesex 
County. 
In Maryland the Raritan is much more sandy than to the 
northeastward, and while fragments of vegetation are widely 
distributed, identifiable remains are rare and extremely local. 
From a locality in the District of Columbia known as Pennsylvania 
Avenue extended, which has the same outcrop as that referred to 
in the present paper as East Washington Heights, the following 
forms have been enumerated: Aralia washingtoniana Berry, Plat- 
anus Heertt Lesq., Salix Lesquereuxit Berry, Sassafras acutilobum 
Lesq., and Sassafras cretaceum Newb. These were recorded in a 
previous paper devoted to the flora of the Magothy formation,* 
to which horizon they were referred. Upon examination this 
outcrop proves to be in the Raritan formation, and several addi- 
tional species have been discovered from it. 
AspPLENIUM DicKsoNIANUM Heer 
Asplenium Dicksonianum Heer, FI. Foss. Arct. 37: 31. pl. rz. f. 1-5. 
1874. 
This late Lower and early Upper Cretaceous fern has been 
recorded from a variety of horizons and localities and has no 
doubt been confused with other fern genera, as for example 
Onychiopsis (Thyrsopteris of Fontaine). It is abundant in the 
New Jersey Raritan,t and forms identical with the New Jersey 
material are present at Shannon Hill in Cecil County, Maryland, 
and at East Washington Heights in the District of Columbia. 
Cladophlebis socialis (Heer) 
Pecopteris socialis Heer, Fl. Foss. Arct. 67: pl. 7. f. 4; pl. 8. f. 15; 
bl. 32. f. 9. 1882 (not Fontaine). ‘ 
The present species was described by Professor Heer from the 
Atane beds of western Greenland. Subsequently Fontaine iden- 
tified as this species a very different form from the Patapsco forma- 
tion of Virginia, a form that I have referred to Cladophlebis 
Browniana (Dunker) Seward. 
Remains identical with Heer’s type, which I refer to the form 
* Berry, Bull. Torrey Club 37: 19-29. 1910. 
+ Newberry, Fl. Amboy Clays 39. pl. 1. f. 6, 7; pl. 2. f. 1-8; pl..3. f. 3. 18096. 
