218 BR. T. Hill—Outlying Areas of the Comanche 
about the horizon of the Kiamitia. The absence of limestone in 
the Kansas section adds another element of difficulty in the cor- 
relation, because a fauna occurring in shales is often more closely 
related to a slightly earlier or slightly later fauna in beds of the 
same lithologic character than it is to a strictly contemporaneous 
fauna in limestone or sandstone. That is, differences in local 
faunas are often in part due to differences in depth of water and 
in character of the sea bottom. 
The similarity of the faunas in Kansas, at Tucumcari, New 
Mexico, and near El Paso, Texas, will allow greater confidence 
in correlating the beds at these three places. 
Very respectfully, 
(Signed) T. W. Stanton. 
List of Fossils from Black Hills, Kansas. 
No. 4. Grypheza forniculata Lamna sp.? A shark’s tooth 
White. Small specimens— probably of this genus. 
young or depauperate exam- No. 13. Ostrea sp. 
ples of this species. Gry pha forniculata White. 
No. 2, 5 and 9, contain indeter- Cyprimeria sp. 
minate fragments of fossils. Fragments of other forms oc-. 
No. 6. Corbula crassicostata curring in Nos. 11 and 15. 
Cragin. No. 15. Gryphea forniculata 
Ostrea sp. White. 
Gryphea forniculata W hite. Exogyra texana Roemer. 
Exogyra texana Roemer. Avicula belviderensis Cragin. 
Nucula sp. “ _ leveretti Cragin? 
Cardium mudgei Cragin? Lithophagus n. sp. 
Cardium bisolaris Cragin. Trigonia emoryi Conrad. 
Roudaria? quadrans Cragin. Cardita belviderensis Cragin. 
Cytherea? sp. Cardium (Protocardia) texa- 
No. 11. Tellina? sp. num Con. 
Mactra antiqua Cragin. Cyprimeria sp. 
Corbula crassicostata Cragin.  Tellina? sp. 
Dentalium sp. Natica sp. 
Natica sp. Turritella sp. related to T. 
Anchura kiowana Cragin. seriatim-granulata Roem. 
Trochus texanus Roemer. Anchura kiowana Cragin. 
Turritella sp. related to T. Sphenodiscus sp. 
serlatim-granulata Roem. Lamna? sp. 
Schlenbachia peruviana von  Reptilian vertebra. 
Buch. 
Irom Blue Cut Mound, four miles southwest of Belvidere, Kan. 
No. 5. Ostrea sp. No. 6. Ostrea sp. 
Avicula belviderensis Cragin. Gryphea pitcheri Morton,? 
Inoceramus sp. Turritella sp. related to T. 
Corbula crassicostata Cragin. seriatim-granulata Roem. 
Sphenodiscus sp. 
