ILLUSTRATIONS. 



Plates. Pacing page 



A. Generalized section of the Devonian series in Missouri 1 



B. Devonian outcrops in central Missouri 3 



C. Devonian outcrops in northeast Missouri 5 



D. a. Mineola overlying tilted Jefferson City 7 



b. The lower contact of the Mineola on Qedar Creek, Ralls County 7 



E. a. Paleographic map of Cooper seas in North America 9 



b. Paleographic map of Mineola seas in North America 9 



c. Paleographic map of Snyder Creek seas in North America 9 



• F. a. Cooper geography and outcrops in Missouri 21 



b. Mineola geography and outcrops in Missouri 21 



G. a. Callaway geography and outcrops in Missouri. . . -, 36 



b. Snyder Creek geography and outcrops in Missouri 36 



H. a. Devonian-Mississippian contact near Providence, Boone County 38 



b. Sylamore sandstone filling a cave in the Cooper limestone 38 



Map of Devonian outcrops along Missouri River In pocket. 



1-71 Fossils from the Devonian in Missouri 280 



Figures. 



1. Sections of Streptelasma cooperensis Branson • 48 



2. Sections of Cyathophyllum halli (Edwards and Haime) ' 50 



3. Sections of Chonophyllum ellipticon Hall, and Diplophylum callawayensis 



Branson 52 



4. Sections of Favosites alpenensis Winchell, and Favosites sp. undet 53 



5. Sections of Ceratopora snyderensis n. sp., and Favosites limitaris Rominger. . . 55 



6. Sections of Pentamerella arata (Conrad), and Pentamerella fultonensis Branson. 89 



7. Sictions of Gypidula marioncnsis Greger 90 



8. Sections of Cranaena iowensis Hall 96 



9. Sections of Spirifer asper Hall, S. curyteines Hall, S. annae Swallow, S. 



suovaricosus Hall and Whitfield, Syringothyris hannibalensis (Swallow), 



and Syringothyris occidentalis (Swallow) 105 



10. Outline of aperture of Gomphoceras hyatti Whitfield 159 



(vi)' 



