DEVELOPMENT OF PALEOBOTANY IN THE ILLINOIS BASIN 85 



Rhabdoxylon 40 



Rhetinotheca 41 



Richardson, E. S., Jr 21, 45 



Richland County, IL 25, 36 



Rock Island, IL 22 



Rock Island (No. l) Coal Member 2, 46 



Rodgers, A. D., Ill 5, 6 



Rogers Survey 5 



Rolfe, C. W 4, 5 



Rosso, S. W 40, 45 



Roth, E. A 41 



Rothwell, G. W 4l 



Rotodontiospermum 14 



Sahara Coal Company No. 6 Mine 



34, 36-39 



8-10, 12, 15, 20 



8, 



41 



27 



St. Louis Limestone Formation 

 St. Wendel, IN 



Salem Limestone Formation 

 Sandoe, M. T 

 Sarton, G. . 

 Savage, T. E 

 Schabilion, J. T 

 Schlanker, C. M 

 Schoolcraft, H. 

 Schopf, J. M. . 



33, 

 Schopf iastrum . 

 Schopfitheca . . 

 Schultztown Coal 

 Scolecopteris . 

 Scott, D. H. .. 



seeds 



Segal, R. H. .. 

 Selaginella . . . 

 Sellards, E. H. 



Sermaya 



Seward, A. C. . 

 Shabica, C. W. 

 Shaver, R. H. . 

 Shawneetown, IL 

 Shelbyville Coal Member 



Shumway Cyclothem 



Shutts, C. F 



sideritic nodules 



siliceous coal balls .. 



Silurian 



Silver Island Strip Mine 



Silverwood, IN 



Simon, J. A 



Simons, C. M 



Simpson, J. B 



Skartvedt, Romayne .... 



Smith, G. E 



Smith, J. G 



Smith, W. H 



Southern Illinois University 

 South Wilmington, IL 



42, 



33 



33-34 



38, 48 

 50 



25, 37, 39 

 50 



..41 

 ...6 

 ..50 

 ..4q 

 ..40 

 4, 5 

 24, 26-31 

 44, 46, 49 

 38 

 41 



35 



17 



12 



.2, 45 

 ....41 



7 



41, 49 

 ....39 

 25, 40 



7 



40 



14, 27 

 ....20 

 2 



25, 38 

 46, 47 



...37 

 ...24 

 2, 24 

 37, 41 

 .50 

 .26 

 .26 

 33, 38 

 ..15 

 ..42 

 ..22 

 ...2 

 ..51 

 12, 20, 38 

 ....35, 50 

 16, 25, 38 



Sphenophyllum 17, 25, 27, 29, 31, 38, 40 



sphenops ids 27 , 35 



Sphenostrobus 40 



Spohn, P. A 40 



Spoon Formation 2, 44 



spores 3, 4, 7, 20, 23, 24, 28-30, 32, 33 



35, 40-47, 49, 51 



Sporocarpon 39 



Springfield Coal Member (V) of Indiana 2 



26, 30, 37, 39 



Springfield, IL 6, 7, 21 



Springfield (No. 5) Coal Member of Illinois 



2, 8, 13, 14, 18, 25, 43 



Stanley Cemetery flora 24 



Staplin, F. L 50 



State Geological Surveys .-3-10, 12-13, 17-20 



22, 24, 27-28, 31, 33 



36-38, 42-44, 46-49, 51-52 



Staud, J. N 42 



Steidtmann, W. E 31, 41 



Stelastellara 38 



Stephanian 18 , 22-23 



Stephanospermum 41 



Stewart, W. N 14, 24, 31-35, 37, 39, 41 



43, 44 



Stewart iopteris 37 



Stidd, B. M 33, 38, 40, 41, 45 



Stigmaria 9, 28, 31, 33, 40 



Stopes, M. C 25, 46 



Stopes-Heerlen system of coal petrography. .46 



Sturgis, KY 13, 25, 26 



Stutzer, Otto 10 



Sullivant, W. S. 6 



Summum (No. 4) Coal 2, 16, 38 



Sutcliff ia 41 



Tar Springs Formation 50 



Tarter Coal Member 47 



Tasmanites 50, 51 



Taxospermum 41 



Taylor, T. N. .20, 31, 32, 35, 38, 40, 41, 45 



Tedelea 35, 40 



Tenon, L. R 51 



Teichmuller, M 25 



Tennessee 43, 51 



Tertiary 51 



Thiessen, Reinhardt 12, 42, 46, 47 



thin sectioning 26, 28, 42, 45-47 



Thomas, B. W 51 



Thomas, H. H 23, 29 



Thompson, F. 18, 19, 21, 22 



Tilak, S. T 31, 39 



Tilton, J. L 11, 12 



Tippo, Oswald 32 



Torispora 45 



Torrey, R. E 32 



Traverse , Alfred 41 



Triletes 45 



Trivoli Coal 43 



