138 Scientific Intelligence. a 
strata of similar age, but adds: “In other regions, however, where the : 
line between Devonian and Carboniferous is not so well defined as in 
New York and to the westward, these forms may be found to have @ 
a 
closing remark: “ Within New York these fossils are restricted to the 
force, I leave geologists to decide. These same doctrines, carried out it 
geological equivalency can never be fulfilled when sedimentary fo 
are studied over wide geographical areas.” 
(9.) The Flora of the Devonian period.—After some general obsertir 
tions on the subject, a recent article by Dr. Dawson (Quart. Journ. Geel. 
t 
age there consisting of limestones, A few remarks are added upon the 
group, exact demarcation of which, however, if it bas any 
existence, is not yet understood, eo 
(10.) Preliminary notice of the Fauna of the Potsdam sandstone; with é 
ieuek ae a beara known species of fossils, and descriptions 
rom i 
five plates) —This atisle. © — wgeliot oa 
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Adentity of the forms referred to th 
Contains descriptions of 3 new ‘i 
