BKKDE : FAUNAL STUDIES, II. 165 



Productus nebraskensis Owen. 



Productus pertenuis Meek. 



Hi timUiria perplc.va ( McChesney ) Schuchert. 



Si minula argentia (Shepard) Hall. 



Spirifer cameratus Morton. 



Aviculopecten carboniferus (Stevens) Meek. 



Aviculopecten maccoyi Meek and Hayden. 



Aviculopecten occidental i* (Shumard) White. 



Limopteria gibbosa ( Meek and Worthen ) . 



22. Tecumseh Shales. A stratum of shales about seventy- 

 five feet in thickness, nearly non-fossiliferous, of fine texture, 

 containing abundant ferruginous concretions and occasional lay- 

 ers of soft shaly sandstone. According to Bennett, these may 

 represent the Kanwaka shales. 4 



23. Deer Creek Limestone. 4 Three layers of limestone 

 separated by layers of shale. The total thickness of the forma- 

 tion is fifteen to twenty-five feet. The principal stratum is the 

 uppermost, which is from seven to twelve feet thick. Most of 

 the fossils below are collected from this upper layer. It is a 

 massive, light gray limestone, tinged with yellow. The texture 

 often varies much in a short distance, grading into inclusions 

 or banks of blue argillaceous limestone in which the fossils are 

 excellently preserved. It is best exposed at Calhoun's Bluffs, 

 in the cut of the Union Pacific railroad three miles northeast 

 of Topeka. 



Fusulina sccalica ( Say ) . 



Lophophyllum profundum (Milne-Edwards and Haime)Foerste. 



Archseocidaris agassizi Hall. 



Oligoporus minutus Beede. 



Crinoid stems. 



Fenestella hexagonalis Rogers ? 



Fenestella sp. 



Pinnatopora pyriformis Rogers. 



Polypora distincta Ulrich ? Probably a new species. It dif- 

 fers from this species in having fenestrules broader and shorter 

 and slightly more slender branches. However, this may be due 

 in a large part to the particular portion of the zoarium of which 

 our specimens are fragments. 



4. "Deer Creek Limestone," Univ. Geol. Surv. Kans., II, p. 117. 



