BEEDE AND RoGERS.] Coal Measures Faunal Studies. 339 
the succeeding faunas, only 26 or 28 of the 111 being found. 
Fusulinella is absent from the Kansas rocks, though it is pres- 
ent in strata apparently of the same horizon at Knobnoster, 
Mo. 
Stage B.—This stage is composed of the Fort Scott lime- 
stones, Labette shales, Pawnee limestone, Walnut shales, Cof- 
feyville limestone and Pleasanton shales. During this stage 
barriers were broken down and a great influx of species oc- 
eurred. Sixty species are introduced in the Fort Scott limestone, 
many of which play important parts during the succeeding 
epochs, and fifteen species are added during the remaining for- 
mations. The species which were quite abundant in this stage 
and not in the succeeding ones are Squamularia perplexa 
(McChes.) and Fusulinella sp. Marginifera muricata N. and 
P., Cypridella americana Rog. and Griffithides scitula M. and 
W. become moderately abundant only in rocks of this age. 
With the exception of Marginifera muricatus (N. and P.), 
all the species may be said to culminate in Stage A. Chetetes 
milleporaceous forms such a striking feature of it that it may 
be designated the Chetetes milleporaceous zone. 
Of the species not mentioned, Productus semireticulatus 
Mart., P. punctatus Mart., P. pertenuis Meek, Spirifer cam- 
eratus Mort., Marginifera longispinus (Sow.), Axophyllum 
rude W. and St. J., become abundant for the first time in the 
Fort Scott limestone. The following species first come into 
prominence in the Labette shales: Derbya crassa (M. and H.), 
Orbiculoidea missouriensis (Shum.), Productus cora d’Orb., 
Nucula ventricosa Hall, and Nuculana attenuata Meek. In 
the Pawnee limestone Lophophyllum westtui Beede, Fenestella 
limbata Foerste, Fustulipora nodulifera Meek, and Hustedia 
mormont (Marc.) first assume prominence among their 
associates. Nineteen other species, which are among the 
best-known Coal Measures fossils, were introduced during 
Stage B. They are: Campophyllum torquium Owen, 
Polypora, elliptica Rog., Rhombocladia delicata Rog., Rhom- 
bopora lepidodendroidea Meek, Stenopora  carbonaria 
(Worth.), Streblotrypa prisca G. and H., Chonetes verneui- 
lanus N. and P., Dielasma bovidens (Mort.), Meekella striati- 
costata (McChes.), Productus costatus Sow., Aviculopecten 
carboniferus Stev., A. occidentalis Shum., Huchondria neglecta 
(Gein.), Schizodus wheeleri Meek, Bellerophon crassus M. and 
