DEVONIAN LOCALITIES. 47 



(Lower)' ( Jefferson City dolomite 500' 



\Roubidoux sandstone 200' 



(Gasconade dolomitel 



Proctor dolomite \ 600' 

 Potosi dolomite J 



(Elvins formation 75' 



Cambrian \ Bonneterre dolomite # . . 300' 



[Lamotte sandstone 300' 



DEVONIAN LOCALITD2S 



1. Craghead Creek, Callaway County, Mo. Sec. 17, T. 46 N., 

 R. 9 W. Top of Snyder Creek shale. 



2. Cow Creek, Callaway County, Mo. Sec. 25, T. 47 N., R. 8 

 W. Top of Snyder Creek shale. 



3. New Bloomfield, Callaway County, Mo. Sees. 33 and 34, 

 T. 46 N., R. 10 W. Snyder Creek shale. 



4. Mouth of Cow Creek, Callaway County, Mo. S. E. }4 

 sec. 22, T. 47 N., R. 8 W. Snyder Creek shale, Callaway 

 limestone and Mineola limestone. 



5. Near Montgomery City, Montgomery County, Mo. Sec. 11, 

 T. 48 N., R. 6 W. Mineola limestone. 



6. New Florence Region, 5 miles southwest of New Florence. 

 Sec. 3, T. 47 N., R. 5 W. Mineola formation. 



7. Big Springs location, 3 miles northwest of Big Springs, 

 Montgomery County. Sec. 20, T. 47 N., R. 5 W. 



DESCRIPTION OF SPECIES. 



Several of the rarer forms from the Snyder Creek shale and 

 Callaway limestone are not included in the following descriptions, 

 a few forms from the Mineola are represented by specimens too 

 imperfect for identification, and the Cooper material is too 

 poorly represented to be satisfactorily treated. 



The synonomy for the species of all groups excepting the 

 brachiopods includes all descriptive articles. The brachiopod 

 synonomy, for the most part, lists the article which contains the 

 original description, articles giving important name changes, 

 Schuchert's bulletin on the Brachiopoda, and the articles which 

 have appeared since Schuchert's bulletin. 



