BEEDE AND ROGERS.|] Coal Measures Faunal Studies. 245. 
Thus in this horizon there is seen the beginning of a tend- 
ency to eliminate some of the older species of the fauna which 
culminates in the Oread limestone, where twenty species have 
been found for the last time. Among those disappearing with 
the Oread limestone are such important forms as Cypridella 
americana Rog., Rhombocladia delicata Rog., Proboscidella 
sp., Amblysiphonella sp., Limopteria longispina (Cox), Aulo- 
pora? prossert Beede, Huconospira missouriensis (Swall.), 
Ephippoceras ferratus (Cox), Domatoceras lasallense (M. 
and W.), Fenestella perelegans Rog., Ceriocrinus missourien- 
sis M. and G., Thamniscus tenuiramus Rog.? and Fenestella 
kansasensis Rog. Productus cora becomes quite as abundant 
here as at any other horizon. 
Seven species seem to be peculiar to the Oread limestone: 
Orthonema salteri M. and W., Pinnatopora ptiloporoidea Rog.,. 
Polypora missouriensis Rog.?, Chenocardia ovata M. and W., 
Orthoceras munstrianum M. and W., Derbya broadheadi H. 
and C., and Polypora spinulifera Ulr.? 
In the lower Oread there is an abundance of a slender spe- 
cies of Fusulina resembling in outward appearance Fusulina 
longissima Moell. While some important species are intro- 
duced in the Oread and Kickapoo limestones, yet the salient 
feature of the two horizons is the disappearance of twenty 
species in the former and seven or eight in the latter. After 
the close of Stage F this loss of species is considerably checked 
until the Howard limestone is reached. 
Stage G.—This stage corresponds with Haworth’s Shawnee 
formation, except that its top is placed at the top of the How- 
ard limestone instead of the Burlingame limestone, throwing 
the Scranton shales into the following stage. It comprises the 
Kanwaka shales, Lecompton limestone, Tecumseh shales, Deer 
Creek limestone, Calhoun shales, Topeka limestone, Severy 
shales and the Howard limestone. About fifteen species are 
added during this stage and thirty-eight are recorded for the 
last time, twenty-eight of which appear last in the Howard 
limestone. Twentv-five species are known only from this 
stage. The most important introduction is that of Stropha- 
losia sp. in comparative abundance in the Topeka limestone. 
This species is an important element of the fauna of the 
Florena and Garrison formations, to be noted later. 
™ the Lecompton limestone Fusulina secalica (Say) first 
became extremely abundant. Fenestella hexagonalis Rog. and 
