PLATE XVII. 



Page. 

 Fig. 1. GoxiATiTKs kentuckibxsis Miller _ 77 



Lower Carboniferfms, Crab Orchard, Ky. 

 Fkjs. 2-0. GoNi.vTiTEs xEwsojii Smith, sp. nov 78 



Lower Carboniferous, St. Liiuii?-Chester .«tage, Batesville, Ark. 



Fig.s. 2, 3. Natural size. 



Fig. 4. Inner coil of specimen shuwn in lig. .".; diameter 9 mm., 3 times enlarged. 



Fig. 5. Three times enlarged. 

 Fi«s. 6-8. Gastrioceras illixoisex.se Miller and Gurley 91 



Upper Coal Measures, Montgomery County, 111. 

 Figs. 9-11. Gastrkh'Eras kans.^sense Miller and (xurley 91 



Upper Coal ^Measures, Kansas CJity, Mo. 

 Figs. 12-14. Goniatites greenxastlexsis Jliller ami ( iurley 76 



Lower Carboniferous, Greeneastle, Ind. 

 Figs. 15-17. Gastrioceras subc-vvum Miller and Gurley 97 



LTpper Coal Mea,sures, Montgomery County, 111. 

 Figs. 18-20. Agaxides .iessie.e Jliller and (iurley 115 



Lower Carboniferous, Sedalia, Mh. 

 Note. — Figs. 1 and (i-20 loaned Ijy the University of Chicago, from Bull. Illinois State Mus. 

 Nat. Hist. No. 11. 



1,'!2 



