(53) 
thus far been found wanting. Other Raritan genera which 
do not appear in the Matawan formation are Menrspermites, 
Diospyros, Cissttes, Ilex, Ctnnamomum, Dalbergia, Bau- 
hinta, Colutea, Planera, Viburnum, juglans, etc.; several 
of these occur in the upper layers of the Raritan, and future 
search ought to disclose some of them in the Matawan. 
Celastrophyllum with abundant remains of ten species in the 
Raritan (all horizons) has but two species in the Matawan, 
one of these being new and unrelated to any of the known 
Raritan species. Widdringtonztes is abundant in the Raritan 
as are also Salix inaequalis and Hedera primordialis; Myr- 
stne borealis Heer is one of the commonest leaves at all locali- 
ties in the Raritan, as Seguoza heterophylla Vel. is one of its 
commonest conifers. Celastrus arctica is abundant at South 
Amboy, and should extend up into the Matawan. Numerous 
specimens of Ophioglossum granulatum are also found in the 
Raritan according to Newberry (localities not given). The 
genus Aralza, so abundantly represented in the Raritan, con- 
tinued to develop during Matawan time. We record six 
species, the large-leaved Avalia Ravniana emphasizing the 
similarity of these Atlantic coastal Cretaceous floras with those 
of Greenland. It is of course quite possible, indeed it seems 
probable, that these numerous species of Ara/za may for the 
most part be the variable leaves of a considerably less number 
ot actual species ; especially is this so of the Raritan species. 
This is the extreme northeastern extension of the Matawan, 
and the only locality where plant remains have been found, 
although the underlying Raritan continues northeastward as 
far as Buzzard’s Bay and doubtfully on Cape Cod. This 
northeastern extension has been much modified by forces 
which acted upon it during the Quaternary age and is for 
the most part entirely covered with drift or totally eroded, 
and if the Matawan formerly extended so far north and east 
this has been its fate. Professor Lester F. Ward* proposed 
the name Island series for the northeastern extension of the 
Raritan and makes it the uppermost member of the Potomac, 
*Ann. Rep. U. S. Geol. Surv. 15: 335, 335- 1895. 
