LOCATION OF SAMPLES 



69 



in a diamond drill core from Wabash 

 County, Illinois. The membranes have 

 nearly circular openings and are orna- 

 mented with closely spaced pits or depres- 

 sions. Small round thickenings are present 

 on the example illustrated from the Tarter 

 Coal (pi. 16, fig. 11). 



The membranes illustrated in the pres- 

 ent paper are similar to the "Cuticle Type 

 B" of Wilson and Hoffmeister (1956, pi. V, 

 figs. 1,2) in that they have round openings 

 and do not show any cellular structure, but 

 are dissimilar in being thicker and distinct- 

 ly ornamented with tiny depressions. Eisen- 

 ack (1956) and Wills (1959) illustrate sim- 

 ilar membranes or pellicles of, respectively, 

 eurypterids and "scorpions." 



LOCATION OF SAMPLES 



Figure 6 indicates the counties in Illinois 

 from which samples of coals and carbona- 

 ceous layers have been collected and mac- 

 erated. Geographic locations are listed by 

 county and maceration number on table 2. 



Samples from other states, especially from 

 coals of late Mississippian and early Penn- 

 sylvanian age, also were examined. Their 

 geographic locations are given in table 3. 

 In addition, outcrop samples of 15 coals 

 from the Black Creek, Mary Lee, and Pratt 

 Groups from the Warrior Basin, Walker 

 County, Alabama, were examined. 



Table 2. — Geographic Locations in Illinois 



Maceration 8 



Type b 





Coal c 







I 



vocation 







Number 





Quarter 



Sec. 



T. 



R. 



561 



DD 



Macoupin 



Bond County 



NW 



NE 



NE 



17 



6N 



3W 



600 

 579 A-C 



OU 



SU 



"LaSalle" 

 Colchester (Nc 



Bureau County 



SE 



.2) 



SW 



NW 

 NW 



33 

 33 



16N 

 16N 



he 

 he 



146 

 830 



OU 

 OU 



"Merom" 

 Cohn 



Clark County 



NW 

 Cumberland County 



NE 

 SE 



SW 



NE 



2 

 21 



UN 

 ION 



12W 

 12W 



703 



OU 



"Woodbury" 







SE 



32 



9N 



8E 



878 

 879 

 880 

 881 



DD 

 DD 

 DD 

 DD 



Edgar County 



Grape Creek (No. 6) 

 No. 5 (u) 

 No.S (1) 

 Indiana IV 



NW 

 NW 

 NW 



NW 



NE 

 NE 

 NE 

 NE 



1 

 1 



1 



1 



13N 

 13N 

 13N 

 13N 



11W 

 11W 

 11W 

 11W 



621D 



TD 



DeKoven (?) 



Edwards County 



NW 



NE 



SE 



18 



IN 



10E 



148 



OU 



"Watson" 



Effingham County 





SE 



1 



6N 



5E 



133 



OU 



"Bogota" 



Fayette County 







25 



8N 



3E 



554D 



554E 



535 



537Q 



554F 



DD 

 DD 

 DD 

 DD 



DD 



DeKoven 



Davis 



Davis 



Unnamed coal 

 Stonefort (?, 



Unnamed coal 

 Stonefort (?) 



Franklin County 



SE 

 SE 

 SE 



just above SE 



just above SE 



NE 



NE 

 NW 

 NW 



NE 



NE 

 NE 

 NE 

 SE 



NE 



18 

 18 

 16 



27 



18 



5S 

 5S 

 6S 

 6S 



5S 



2E 

 2E 

 IE 

 3E 



2E 



