GENUS RAISTR1CKIA 



45 



W. and B., 1944, but is smaller in diameter 

 and has a narrower flange. 



Lycospora punctata sp. nov. 

 Plate 10, figure 3 



Description. — Spores are radial, trilete, 

 compressed to a lenticular shape in lateral 

 profile, subtriangular in transverse plane, 

 and have a slightly expanded equatorial 

 ridge. The holotype measures 36.7 X 38 

 microns, and the known size range is from 

 30 to 42 microns. The trilete rays are 

 distinct, and extend almost to the equatorial 

 ridge. The ridge is 2 to 3 microns in 

 width. The spore coat is often folded at 

 the juncture of the ridge and the periphery 

 of the spore coat. The lips are elevated 

 and the commissure is thin. The spore 

 coat is punctate and between 1 to 2 mi- 

 crons thick. 



Holotype.— Maceration 474-A Slide 4, 

 No. 6 coal bed, Franklin County, Illinois. 



Discussion. — L. punctata sp. nov. is 

 similar in construction to L. pseudoan- 

 nulata sp. nov. They are separated by 

 body ornamentation. 



Lycospora gran u lata sp. nov. 

 Plate 10, figures 4, 6 



Description. — Spores are radial, trilete, 

 spherical to subtriangular in transverse 

 plane, without folding of the spore 

 coat, and have a small equatorial ridge. 

 Spores are laterally compressed but often 

 not in good proximal-distal orientation. 

 Tetrad groups are frequently found in most 

 macerations. The holotype (figure 6) 

 measures 31.5 X 37.8 microns, and the 

 known size range is from 30 to 41 microns. 

 The trilete rays are distinct with greatly 

 elevated lips and a thin commissure. The 

 rays extend to the margin of the spore wall. 

 The spore coat is coarsely granulose and 2 

 or more microns thick. 



Holotype. — Maceration 519-A Slide 14, 

 Dekoven coal bed, Williamson County, 

 Illinois. 



Discussion. — L. granulata sp. nov. is 

 characterized by coarse granulations and 

 greatly developed lips. 



Lycospora pseudoannulata sp. nov. 

 Plate 10, figure 7 



Description. — Spores are radial, trilete, 

 roundly triangular in transverse plane, have 

 minor folds, and a greatly expanded equa- 

 torial ridge appearing to resemble a flange. 

 The holotype measures 39.7 X 42 microns, 

 and the known size range is from 30 to 42 

 microns. The trilete rays are distinct, the 

 lips are developed and elevated, and the 

 commissure is definite. The spore coat is 

 granulose, and the flange-like equatorial 

 ridge is levigate with numerous small per- 

 forations which are best observed when 

 using an oil immersion objective. The 

 spore coat is more than 2 and less than 3 

 microns thick, and minor folds occur at 

 the juncture of the equatorial ridge and the 

 spore coat. 



Holotype. — Maceration 587 Slide 17, 

 Battery Rock coal bed, Hardin County, 

 Illinois. 



Discussion. — L. pseudoannulata sp. nov. 

 is characterized by its greatly developed 

 equatorial ridge. 



GENUS Raistrickia S. W. and B., 1944 



Plate 10, figures 8-9; Plate 11, figures 1-8; Plate 

 12, figure 1 



Raistrickia is rarely abundant in Illinois 

 coal beds, but it is important for correla- 

 tion purposes. Species of the genus are 

 known to be present in all of the coal beds 

 of the Caseyville and Tradewater groups, 

 and in most of the coal beds in the Carbon- 

 dale and McLeansboro groups. The No. 

 2 and No. 7 coal beds contain more speci- 

 mens of Raistrickia than any other coal bed 

 in Illinois, though they are not truly abun- 

 dant even in these two coal beds. 



Perfect specimens of Raistrickia are rare, 

 due to their ornamentation. The spines or 

 setae are often folded or twisted. How- 

 ever, no trouble has yet been experienced 

 in differentiating species. 



Plant microfossils classified under the 

 genus Raistrickia are closely related to the 

 spores of Senftenbergia plumosa, as pointed 

 out by Schopf, Wilson, and Bentall 

 (1944). It seems reasonable to expect that 



