1908 ] 
Recent Baltimore Meetings 
155 
America”, by E. 0. Ulrich was read to a crowded audience. Dr. 
Ulrich has spent many years during his connection with the U. S. 
Geological Survey in gathering first hand knowledge of the Paleo- 
zoic formations, and his conclusions are the ripe fruit of a mind 
long trained in field observation and paleontology. Such vague 
terms as Cambro-Ordovician and Devon o-Mississippian are decried 
by him as savoring of ignorance, and the attempt is made to show 
that defiinite boundaries can be discovered by careful field search 
and close correlation. “The proposed classification is based 
primarily on crustal movements, diastrophism, the succession of 
which is determined by the faunal evidence. The occurance of 
such movements is determined, aside from plain physical evidence, 
primarily by mutations in the faunas, especially by the introduc- 
tion of new faunal elements and facies, etc.” One of the pro- 
posed changes is the insertion of a new system, the Ozarkian, 
so-called for its development in Missouri and Arkansas, between 
the Cambrian and Ordovician systems. This system occurs also 
along the Appalachian Valley from New York to Alabama, and 
is separated from both Cambrian and Ordovician by unconformi- 
ties. Another change consists in placing the Meramec and 
Chester groups of the Mississippian in the system, the Tennesseean, 
between the Mississippian and the Pennsylvanian. 
The meeting of the Society disbanded with the offering of a 
formal vote of thanks to Dr. W. B. Clark and his colleagues for 
the entertainment and courtesy extended to all visiting geologists. 
H. N. Eaton. 
botany 
The recent meetings in Baltimore of the botanists of America 
were the largest, most interesting, and most successfully conducted 
of any ever held in this country. The botanical societies that 
came together there were Section G. of the American Association 
for the Advancement of Science, The Botanical Society of America, 
The Sullivant Moss Society, The Wild Flower Preservation 
Society, and The American Nature Study Society (which is inter- 
ested in the teaching of botany) . 
The Secretaries of Section G. and of the Botanical Society of 
