THE DEVELOPMENT OF A CARBONIFEROUS BRACHIO- 

 POD, CHONETES GRANULIFER OWEN 



F. C. GREENE 



INTRODUCTION 



- Through the kindness of Professor J. W. Beede the writer had 

 placed at his disposal for study a large collection of Chonetes granu- 

 lijer, the adults alone probably numbering two thousand specimens. 

 The majority of these specimens are finely preserved and this together 

 with the great range in their size, gives an excellent opportunity for 

 a study of the development of the species. 



Chonetes granulifer has been found in the following horizons 

 arranged in descending order: 



T~, • c • ^ Ft. Riley limestone. 



Permian benes i wr e a \- >. 



( Wreford limestone. 



Neosho shale. 

 Florena shale. 

 Cottonwood limestone. 

 Eskridge shale. 

 Neva limestone. 

 Elmdale formation. 

 Americus limestone. 

 Emporia limestone. 



Pennsylvanian Series ( Burlingame shale. 



Howard limestone. 

 Severy shale. 

 Topeka limestone. 

 Deer Creek limestone. 

 Lecompton limestone. 

 Oread limestone. 

 Kickapoo limestone. 

 Stanton limestone. 



First will be taken up a study of the form from the Florena shales 

 at Florena and Grand Summit, from which a complete series was 

 obtained, and then a study of the development based on this series. 

 This study has been under the direction of Professors E. R. Cumings 

 and J. W. Beede of Indiana University, and the author wishes to 



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