No. 459] AMBER IN EASTERN UNITED STATES. 145 
tion with the leafy twigs of Seguota heterophylla Vel., and S. 
reichenbachi (Gein.) Heer. It may also be of interest to note 
that leaves of Sequoia are said to be associated with the amber 
of Japan. 
Other coniferous remains which have been found in the 
Kreischerville clays, and which may have contributed to our 
supply of amber, are Widdringtonites reichii (Ett.) Heer., Junt- 
perus hypnoides Heer, Dammara microlepis Heer., and Pinus sp. 
The genus Dammara is prominently represented in our living 
flora by D. australis Lamb, the well known “Kauri” gum tree 
of Australia. Its former existence, however, as an element in 
the Cretaceous flora of North America, is somewhat problematic, 
and is based entirely upon the presence of certain small cone 
scales, the exact botanical affinities of which have never been 
satisfactorily determined. The occurrence of remains of the 
genus Pinus is more significant perhaps than any of the other 
three last mentioned, by reason of the fact that the typical 
amber of the Baltic provinces in Europe is recognized as a prod- 
uct of the extinct Tertiary species, P. suecimifera (Goepp.) 
Conw. 
ACKNOWLEDGMENTS. 
For answers to letters of inquiry on my part I am indebted 
to Dr. Lester F. Ward and Dr. F. H. Knowlton of the United 
States National Museum, Mr. A. Bibbins of the Woman’s Col- 
lege of Baltimore, Mr. L. P. Gratacap and Mr. Barnum Brown 
of the American Museum of Natural History, and to Mr. Geo. 
F. Kunz, of the United States Geological Survey. 
