LOCATIONS OF COAL SAMPLES 



55 



eluding the bladder which covers the distal 

 and a large portion of the proximal surface 

 of the body. The body is spherical, and 

 folding of the bladder membrane and body 

 is common. The overall dimensions of the 

 holotype are 92.4 X 86.1 microns; the body 

 dimensions are 56.7 X 52.5 microns. The 

 known overall size range is from 81 to 98 

 microns, and that of the body is from 52 

 to 61 microns. The trilete rays are dis- 

 tinct, and extend nearly to the margin of 

 the body wall. The lips are greatly ele- 

 vated, and the suture is very thin. The 

 bladder externally is essentially levigate, 

 and internally it is distinctly reticulate. 

 The body is levigate to minutely granulose. 

 The bladder appears to be somewhat 

 thickened at the periphery of the bladder. 

 The body is 2 to 3 microns thick, the 

 bladder is 1.5 to 2.25 microns thick. 



Holotype. — Maceration 540-C Slide 8, 

 No. 6 coal bed, Fulton County, Illinois. 



Discussion. — Wilsonia delicata sp. nov. 

 differs from W . universica sp. nov. in being 

 larger in size, having somewhat shorter 

 rays, and in having less of the proximal side 

 of the body covered by the bladder. 



LOCATIONS OF COAL SAMPLES 



Figure 5 indicates the 47 counties in 

 Illinois from which samples of coal beds 

 have been collected and macerated. Geo- 

 graphic locations are listed by county 

 and maceration number. Rotary and dia- 

 mond-drill holes usually contained several 

 coal bed samples listed as A, B, C, etc. 

 and the names of these coal beds are not 

 given. 



