338 University Geological Survey of Kansas. 
not contain Pleurotomaria scitula M. and W., Petrodus occi- 
dentalis and Clinopistha radiata Hall? from higher horizons. 
Among these species Chonetes mesolobus N. and P. and 
Marginifera muricata N. and P. are of great importance. 
The former is characteristic of nearly the whole section and un- 
known above it, and the latter is the preponderating species 
in the Cherokee shales and is more or less common through- 
out Series I, but is very rare in the succeeding stages. Series 
I may well be characterized as the Chonetes mesolobus zone. 
Fusulinella is also an important element in the fauna of these 
rocks although never so abundant as Fusulina in the upper 
rocks. In southern Kansas it is confined to the strata below 
the Bethany Falls limestone, but at Kansas City Foraminifera 
occur in the Bethany Falls limestone, possibly belonging to 
this genus. Especially in the Pawnee and Altamont lime- 
stones, Squamularia perplexa (McChes.) is frequently ex- 
tremely abundant and is usually smaller in size than speci- 
mens from considerably higher horizons. It culminates in 
these limestones. Chetetes milleporaceous M.-E. and H. forms 
reefs in the upper Fort Scott limestone and is very abundant 
in the Pawnee limestone. It is similar in these respects to 
the occurrence of Chetetes at Bend, Tex., though the masses 
are somewhat smaller. Similar conditions exist in rocks of 
the same or nearly the same horizon at Doran siding, east of 
Holden, Mo., where the creek crossing the railroad has ex- 
posed a considerable area of the limestone. 
As would necessarily be the case, inasmuch as the Kansas 
section begins with the Mississippian Coal Measures uncon- 
formity, the rocks of Series I were characterized by the intro- 
duction of the typical Coal Measures species. Sixty-three of 
the 111 species which become numerically important were in- 
troduced before its close, and twenty-five of them attain prom- 
inence before the close of the epoch. . 
Siage A.—Series I consists of two well-defined faunas, 
those of Stages A and B. The fauna of Stage A is confined to 
the Cherokee shales, and is characterized by the dominance of 
Marginifera muricata (N. and P.) over all other species, and 
may be referred to as the Marginifera muricata zone, although 
it extends well into the formations above. In our collections 
the five cephalopods mentioned above are confined to it, as is 
Aclisina minuta Stev. The principal characteristic of the 
stage is the absence of the species playing important roles in 
