130 THE DEVONIAN OF MISSOURI. 



CHAPTER II 



Fauna of the Middle Devonian of Southeastern Missouri 

 E. B. Branson and J. S. Williams 



In order to make the volume on the Devonian of Missouri 

 fairly complete the writers have figured and made comments 

 on the species from the Middle Devonian of southeastern Mis- 

 souri. 



Most of the specimens studied were collected by Professor 

 Stuart Weller and his students. Small collections have been 

 made by Professor M. G. Mehl and the writers and by students 

 from the University of Missouri. Most of the species were identi- 

 fied by Professor Weller' s students before they were sent to the 

 writers, and the writers merely verified the identifications. 



The classification of the Southeastern Missouri Middle 

 Devonian was furnished by Weller, and Tansey and Stewart 

 discuss the stratigraphy on pages 166 and 213 of this volume. 



The synonomy is not complete. The Brachiopod synonomy 

 includes all of the descriptive articles. since Schuchert's Bibliog- 

 raphy was published and two or three of the references previous 

 to the Bibliography. The synonomy for species of other phyla 

 includes recent articles and some of the earlier articles which con- 

 tained descriptions and figures. 



The figures are of the best specimens from the area, but we 

 have not intended to more than definitely indicate the species 

 in any case excepting where the species is new. Copied figures 

 are used for some well-known species. 



Professor Weller has made extensive field studies of the 

 Southeastern Missouri Middle Devonian, and it would be 

 superfluous for us to make any comments on the stratigraphy 

 or correlations. On page 2 of Chapter I, there is a correlation 

 table that gives the relative positions of the strata. 



The following are lists of fossils from the various formations 

 as determined by the writers. 



