Editorial Comment. 237 
and the Walker quinquennial grand prize of $1,000 from the 
Boston Society of Natural History in 1884. 
He is the only surviving founder of the American Associa- 
tion of Geologists which was organized in Philadelphia in 1840 
and out of which grew the A.A.A.S. He was one of the char- 
ter members of the National Academy of Science, and one of 
the original founders of the International Congress of Geol- 
ogists, at all sessions of the latter which he has attended hav- 
ing been elected vice-president representing the United States. 
He was elected the first president of the recently organized 
Geological Society of America. 
He was elected one of the foreign members of the Geological 
Society of London in 1848 and received its Wollaston medal 
in 1858, and he was elected correspondent of the Academy of 
Sciences of Paris in 1884. 
Probably no one living has influenced to a greater extent 
the domain of invertebrate paleontology, and much of the 
exactitude of knowledge which his researches have introduced 
into the New York reports have made, these the standard of 
geological nomenclature and classification throughout Amer- 
ica. 
In this connection a fragment of the history of the relations 
between Hayden and Hall is interesting. 
In 1851 on Prof. Hall's return from a successful geological 
exploration of the upper lakes and the' Mississippi valley he 
called upon Dr. J. S. Newberry at Cleveland, Ohio, and was 
introduced to a young man in the latter's office who had made 
some interesting collections in the limestone at Sandusky 
and the neighboring country. This young man was Ferdinand 
V. Hayden. His zeal and industry impressed Prof. Hall and 
his great desire to undertake explorations and the collection 
of fossils prompted the New York geologist to encourage him 
in this purpose. The region of the "Mauvaises Terres" then 
so new and deeply interesting was spoken of and Hayden was 
asked if he had the courage to undertake an exploration to 
that region, which he answered affirmatively. During that 
winter it was arranged through correspondence that Hayden 
was to start in the early spring going up the Missouri in the 
first steamboat of the season. Some difficulties arose at St. 
Louis through another exploring party of which Prof. Hall 
had not known, and the latter sent Mr. F. B. Meek, at that 
time an assistant and draughtsman in his office at Albany, to 
accompany Hayden. This was Dr. Hayden's first expedition. 
