218 
PROCEEDINGS OF THE ACADEMY OF 
The species I would respectfully propose to dedicate to our fellow member 
W. Parker Fouike, tban whom none ' f our number is more zealous in the ad- 
vancement of the great objects of this Academy. The name of the great extinct 
saurian will then appear as Hadrosaurus Foulkii. 
Mr. Lea remarked that the members must all feel under great oblig ations to their 
fellow m 'inber, W. Parker Fouike, Esq., for the conct-ption, the industry and per- 
severance which he has brouglit to the exliutnaiiuu of thesis various reliques 
of a former state of existence of orgmst^ms, tot^illy different from any which 
now live on the surface of the earth ; for there no longer now remains a single 
creation wiiich had life during the whole of the Cretaceous period. With the 
true spirit of scientific investigation he has en-ibLd geologists to examine tbese 
important remains of a former world, and with equal liberality he has placed 
the whole in the possession of the Academy. It was with very great pleasure 
that Mr. Lea assisted, with Dr. Leidy for a few days, by the invitation of their 
friend, during the progress of his successful labors. 
The result has been that one of the most interesting fossil animals on record 
has been ^dded to the fauna of this period, the bones of which have just been so 
happily illustrMted by Dr. Leidy. There wereals" numerous genera and species 
of Mollusca, as well as coniferous plants added to our p^laBontology and fossil 
botany. 
Geological science is indebted to our late fellow member, Prof. Vanuxem, for 
the identification ol the m<Ml beds of New Jersey and Delaware with the Cretace- 
ous group of Europe, but it was not then known in either country that there 
were so many subdivisions ut the group, and the exact parallelism of the green 
sand was not attempted to be traced. While studying in Paris, under the in- 
struction of Brogui irt,hp was led to the conclu . ion, from his previous exanination 
of man}"- of the^e " marl pits," with Mr. Lea, that the moUusca were the same 
which belonged to the upper beds of Brogniart's " Pelagiques." At that early 
period of our geological history, when he was (examining the Paris basin, he 
was convincei, in 1818, ihat the alluvial of Maclure consisted of -'secondary, 
tertiary, and alluvial masses." Subsequently, in January, 1828, his notes were 
published in the Journal of this Academy,* and he gave a tabular view of the 
*• relative geological position" of the secondary, tertiary, and alluvial forma- 
tions of the United States. He also defined their " geographical position," and 
stated that " this bed, (green sand), vi^as argillaceous, and contained greenish 
particles analog uis to tliose which are found in the green sand, or chalk, of 
Europe," and th;it it was "characterised by six genera, viz., Terebratula, Gry- 
phiBU, Ezogyr 1^ Ammnnitps, Baruliies and BeLemnites.'" These views of Professor 
Vanuxem were subsequently confirmed in various papers, al-o published in the 
Academy's Journal, by Dr. Morton, who, in his ■' Synopsis of Organic Remains," 
published in 1834, page 7, says that " Mr. Vanuxem was the first io detect the 
analogy between this deposit (Ferruginous sand,) and tne chalk formation of 
Europe."' Other geologists in various papers and state repoi ts have, by their 
developments, confirmed the opinions of Prof. Vanuxem, and from year to year 
new explorations have tended to demonstrate the vast extent of the Cretaceous 
Formation in the United States east of the Rocky Mountains. 
The Cretaceous Formation commences at Martha's Vineyard, in Massachusetts, 
is largely developed in New Jersey, and is found in Dela ware, Maryland, Vir- 
ginia and the Carolinas. In Georgia, it is more largely d^velojied. Here, 
sweeping round the inferior Strata, the Primary, Silurian, and Carboniferous 
masses, it continues in a very enlarged band in a northerly direction, through 
Alabama, Mississippi and Tennessee, to near the mouth of the Ohio River. 
Crossing the Mississippi River, it descends to the south-west, through Arkan- 
sas, where on the upper waters of the Red River it expands to the n rih, thi oiigh 
Nebraska Territory, far into the British Possessions east of the Kocky Moun- 
Vol. 6, page 57. 
[Dec. 
