the ‘‘pleiocene epoch.’’ Stratigraphic data are lacking, 
but Ambrosine has generally been considered from Cre- 
taceous Atlantic Coastal Plain deposits (probably from 
the Tuscaloosa Formation, which does not differ greatly 
in age from the Magothy, according to Groot, Penny 
and Groot (1961) ). Shepard described the original collec- 
tion as an irregular, oval-shaped mass the size of a man’s 
fist, yellow-brown externally but clove-brown inside. It 
melted to a clear yellow liquid at 460° F, giving con- 
siderable succinic acid before melting. On fusion, a dense 
yellow oil was volatilized, producing an odor similar to 
the resin of pines. It was largely soluble in turpentine, 
alcohol, ether and chloroform. The name ‘‘Ambrosine’’ 
was coined by compounding the two words ‘‘amber’’ 
and ‘‘rosin.”’ 
Three spectra were run from Kincora, Burlington 
County, New Jersey, from the United States National 
Museum Collection 5610, Spectrum H 867 (Plate X VIT) 
is similar to that typical of the Magothy River family of 
ambers. A variation of this spectrum with a band de- 
veloped at 12—12.3 (833-813 cm!) also occurs. 
A single spectrum was made of amber from St. 
Georges, Delaware (USNM #82552). Spectrum H 357 
(Plate XVIII) is generally similar to those from the 
Magothy River and Kincora, New Jersey, localities 
(Plate XVII). Three spectra were made of amber from 
Bordentown, N.J., (USGS collection #95367). All three 
were similar to that represented by H 225(Plate XVIII), 
although the 9.8 (1020 cm-!) band is sometimes more 
accentuated. This spectral type also belongs to the 
Magothy River family. 
Eleven spectra were made of amber from USNM col- 
lection R 7289 from Roebling, N.J. Considerable vari- 
ation in spectra occurs from specimens in this single 
collection. The general variation is shown in spectra H 
[ 85 | 
