on Devonian fossils of New York. 45 
made known their progress and their discoveries; and in 1848, 
appeared in four quarto volumes the final reports on the Geol- 
ogy of the State. These geologists had divided the State into 
four districts; and in seven years they had succeeded in mak- 
ing a map of a hitherto unknown region as large as Ireland 
since become the foundation of stratigraphical Geology in 
America. 
The part described by Professor Hall was the western por- 
tion of the State, that is to say, the portion where the non- 
metamorphic beds were filled with fossils; thus he found 
himself prepared to undertake the publication of the Paleon- 
tology of the State of New York with which he was officially 
charged in 18438, This work has become the great work to 
which Mr, Hall has devoted ail his talents and all his energy. 
Under this modest title, it is not only the description of the 
fossils found in the formations of the State of New York, 
their interruptions, and to collect the fossils for future descrip- 
ions. These long and toilsome journeys, many of them in 
York, a volume of 340 pages and 90 plates. With this com- 
menced the series of Mr. Hall’s paleontological publications; 
# series which has been going on uninterruptedly to the 
include also many memoirs in the octavo Annual Reports of 
the State Museum of Natural History. Volume i of the Pale- 
&ppeared, constitute part 2 of volume v. The first part, de- — 
Voted to the Devonian Lamellibranchs will next appear. 
