720 J. W. BEEDE 
Stage E forms the closing chapter of the conditions existing in 
these rocks. Here several of the species with which we have been 
dealing are found for the last time, examples being Michilinia euge- 
neae, Conocardium parrishi, Lima krotowi, Cryptacanthia compacta, 
and others. 
These three stages make up Series II. It is characterized by the 
features already mentioned and in a negative way by the absence 
of species of extreme importance noted below, which occur in the 
rocks above. 
Stage F is characterized by the absence of the species just 
mentioned and the introduction of Chonetes granulijer, one or two 
species of Enteletes, and the true Fusulinas. Some of these fossils 
color nearly every faunule of the succeeding rocks of the Pennsyl- 
vanian part of the section. Among other important species intro- 
duced were the Amblysiphonellas and other sponges, Limo pteria 
marian, etc. ‘The top horizon of the stage is remarkable for the last 
appearance of twenty species, and the first important development of 
the Fusulinas, a long, slender species, and the first abundance of 
Chonetes granulifer. 
In Stage G an undescribed species of Strophalosia is the only 
permanent addition, while the loss of species amounts to twenty- 
eight (disregarding species peculiar to the stage), most of these being 
found for the last time in the Howard limestone, its topmost member. 
Among these are many prominent Pennsylvanian species, as Squamu- 
laria perplexa, Productus pertenuis, Campophyllum torquium, etc. 
In Stage H, Sedgwickia altriostrata is added in the Burlingame 
limestone and Bairdia, Beyrichiella, and Meekopora appear in the 
uppermost bed. These latter additions may be well associated 
with the succeeding stage as they are found in the marly layer resting 
upon the Americus limestone, and are the precursors of other impor- 
tant introductions which follow. 
Stages F, G, and H comprise Series III. From what has preceded 
it is seen to be characterized by the introduction or development, 
in its basal part, of three of its main faunal elements and is set off 
from the succeeding series by the fact that at least one hundred 
and seventy-five of its species are unknown in the rocks above. 
In Stage I four species first appear which play a very important 
