98 



ILLINOIS STATE GEOLOGICAL SURVEY 



Nowak, J., and Zerndt, J., 1936, Zur Tektonik des 

 ostlichsten Teils des Polnischen Stein- 

 kohlenbeckens: Bull. Intern. Acad. Polon. 

 Sci., ser. A, p. 56-73. 



Pierart, Pierre, 1956, Quelques megaspores con- 

 tenues dans les charbons stephaniens des 

 bassins de Blanzy et de Decazeville: Bull, de 

 la Soc. beige de Geol., de Paleontol. et 

 d'Hydrol., t. 64 (1955), fasc. 3 et dernier, p. 

 587-599. 



Pierart, Pierre, 1957, Note preliminaire sur les 

 megaspores du Westphalien C superieur en 

 Campine beige: Palaont. Zeitschr., Bd. 31, 

 Nr. 1 and 2, p. 46-52. 



Potonie, Robert, 1954a, Stellung der palaozoischen 

 Sporengattungen in natiirlichen System: 

 Palaont. Zeitschr., Bd. 28, Heft 3-4, p. 103- 

 139. 



Potonie, Robert, 1954b, Les spores des plantes 

 paleozoiques dans les systeme naturel (raor- 

 phologique): Lejeunia, Rev. de Bot., t. 18, 

 p. 5-20. 



Potonie, Robert, and Kremp, Gerhard, 1954, Die 

 Gattungen der palaozoischen Sporae dis- 

 persae und ihre Stratigraphie: Geol. Jahrb., 

 Bd. 69, p. 11-194. 



Potonie, Robert, and Kremp, Gerhard, 1955, Die 

 Sporae dispersae des Ruhrkarbons, ihre Mor- 

 phographie und Stratigraphie mit Ausblick 

 en auf Arten anderer Gebiete und Zeit- 

 abschnitte - Teil I: Palaeontographica, Abt. 

 B, Bd. 98, Lief. 1-3, p. 1-136. ' 



Potonie, Robert, and Kremp, Gerhard, 1956, Die 

 Sporae dispersae des Ruhrkarbons, ihre 

 Morphographie und Stratigraphie mit Aus- 

 blicken auf Arten anderer Gebiete und Zeit- 

 abschnitte - Teil II: Palaeontographica, Abt. 

 B, Bd. 99, Lief. 4-6, p. 85-191. 



Read, C. B., 1947, Pennsylvanian floral zones and 

 floral provinces: Jour. Geology, v. 55, no. 3, 

 p. 271-279. 



Remy, Winfried, and Remy, Renate, 1956, Noeg- 

 gerathiostrobus vicinalis E. Weiss und Be- 

 merkungen zu ahnlichen Fruktifikationen: 

 Deutsch. Akad. Wiss., Berlin, Kl. Chem., 

 Geol., u. Biol., Jahrg. 1956, Nr. 2, p. 1-11. 



Rexroad, C. B., 1957, Conodonts from the Chester 

 Series in the type area of southwestern Illi- 

 nois: Illinois Geol. Survey Rept. Inv. 199, 

 43 p. 



Sahabi, Yadollah, 1936, Recherches sur les spores 

 des houilles franchises: Dissertation, Lille, p. 

 1-59. 



Schemel, M. P., 1950a, Carboniferous plant spores 

 from Daggett County, Utah: Jour. Paleon- 

 tology, v. 24, no. 2, p. 232-244. 



Schemel, M. P., 1950b, Cretaceous plant microfos- 

 sils from Iowa: Am. Jour. Botany, v. 37, no. 

 9, p. 750-754. 



Schopf, J. M., 1936a, The paleobotanical signifi- 

 cance of plant structure in coal: Illinois 

 Acad. Sci. Trans., v. 28, no. 2, p. 106-110. 



Schopf, J. M., 1936b, Spores characteristic of Illi- 

 nois Coal No. 6: Illinois Acad. Sci. Trans., 

 v. 28, no. 2, p. 173-176. 



Schopf, J. M., 1938, Spores from the Herrin (No. 6) 

 Coal bed in Illinois: Illinois Geol. Survey 

 Rept. Inv. 50, 73 p. 



Schopf, J. M., 1941a, Contribution to Pennsylva- 

 nian paleobotany - Notes on the Lepidocar- 

 paceae: Am. Midland Naturalist, v. 25, no. 

 3. p. 548-563; reprinted as Illinois Geol. Sur- 

 vey Circ. 73. 



Schopf, J. M., 1941b, Contributions to Pennsylva- 

 nian paleobotany - Mazocarpon oedipternum, 

 sp. nov., and sigillarian relationships: Illi- 

 nois Geol. Survey Rept. Inv. 75, 53 p. 



Schopf, J. M., 1948, Pteridosperm male fructifica- 

 tions; American species of Dolerotheca, with 

 notes regarding certain allied forms: Jour. 

 Paleontology, v. 22, no. 6, p. 681-724; re- 

 printed as Illinois Geol. Survev Rept. Inv. 

 142. 



Schopf, J. M., 1949, Research in coal paleobotany 

 since 1943: Econ. Geology, v. 44, no. 6, p. 

 492-513. 



Schopf, J. M., Wilson, L. R., and Bentall, Ray, 

 1944, An annotated synopsis of Paleozoic fos- 

 sil spores and the definition of generic 

 groups: Illinois Geol. Survey Rept. Inv. 91, 



72 p. 



Schulze, Franz, 1855, tJber das Vorkommen wohl- 

 erhaltener Cellulose in Braunkohle und 

 Steinkohle: K. preuss. Akad. Wiss., Berlin, 

 Math.-phys. Kl., Sitzungsber., p. 676-678. 



Scott, D. H., 1898, On the structure and affinities 

 of fossil plants from the Paleozoic rocks. 

 II. On Spencerites. a new genus of lycopodi- 

 aceous cones from the Coal Measures, found- 

 ed on the Lepidodendron spenceri of Wil- 

 liamson: Royal Soc. London Philos. Trans., 

 ser. B, 1897, v. 189, p. 83-106. 



Siever, Raymond, 1951, The Mississippian-Pennsyl- 

 vanian unconformity in southern Illinois: 

 Am. Assoc. Petroleum Geologists Bull., v. 35, 

 no. 3, p. 542-581; reprinted as Illinois Geol. 

 Survey Rept. Inv. 152. 



Sittler, C, 1955, Methodes et techniques physico- 

 chimiques de preparation des sediments en 

 vue de leur analyse pollinique: Inst, francais 

 petrole Rev. et Annales combustibles liq- 

 uides, v. 10, no. 2, p. 103-114. 



Stach, E., and Zerndt, Jan, 1931, Die Sporen in 

 dem Flamm-, Gasflamm-, und Gas-kohlen 

 des Ruhrkarbons: Gliickauf, Jahrg. 67, Nr. 

 35, p. 1118-1124. 



Surange, K. R., 1952, The morphology of Staurop- 

 teris burntislandica P. Bertrand and its 

 megasporangium, Bensonites fusiformis R. 

 Scott: Royal Soc. London Philos. Trans., ser. 

 B., v. 237, no. 642, p. 73-91. 



