GENUS CIRRATRIRAD1TES 



35 



have the flange development although some 

 isolated spores of Lycospora described later 

 in this report approach more closely a flange 

 development than has been previously 

 known. 



ClRRATRIRADITES AN NU LI FORM IS sp. nOV. 



Kosanke and Brokaw 

 Plate 7, figure 6 



Description. — Spores are radial, trilete, 

 nearly round to roundly triangular in 

 transverse plane and with a definite equa- 

 torial flange. Folding of the spore body 

 is rare; the flange may or may not possess 

 minor folds. The holotype measures 84 X 

 82 microns, and the known size range is 

 from 76 to 90 microns. The spore coat 

 is minutely punctate (as viewed under oil 

 immersion) and the periphery of the flange 

 is irregular, being minutely toothed. The 

 flange is definitely not radially striate and 

 appears to originate slightly to the proximal 

 and distal sides of the equator of the spore. 

 The spore coat of the holotype, exclusive 

 of the flange, measures 73.5 X 71.4 mi- 

 crons. The thin distal areas surrounded by 

 ridges may be present or absent. The tri- 

 lete mark is usually distinct and extends to 

 the periphery of the flange. The spore coat 

 measures 2 to 3 microns in thickness and the 

 flange is 1 to 1.25 microns in thickness. 



Holotype. — Maceration 596-A Slide 8, 

 Grape Creek No. 6 coal bed, Vermilion 

 County, Illinois. 



Discussion. — The portion of the flange 

 which extends beyond the spore body is 

 rather small when contrasted to other 

 species of the genus. This may or may not 

 be due to the fact that the flange originates 

 slightly to the proximal and distal sides of 

 the equator. 



ClRRATRIRADITES ANNULATUS sp. nOV. 



Kosanke and Brokaw 

 Plate 7, figure 4 



Description. — Spores are radial, trilete, 

 roundly triangular in transverse plane, with 

 a definite equatorial flange. Folding of the 

 spore body is rare and only minor folds of 



the flange are known. The holotype meas- 

 ures 89.2 X 98.6 microns, and the known 

 size range is from 84 to 102 microns. The 

 body of the spore measures 65.1 X 67.2 mi- 

 crons. The spore coat is sharply punctate 

 and the punctations vary in size from less 

 than 1 micron to almost 2 microns. The 

 spore coat frequently has on its distal sur- 

 face, opposite the center of the trilete mark, 

 a series of ridges which may enclose four or 

 more areas. The flange is minutely radial- 

 ly striate. The trilete mark is distinct and 

 extends to the periphery of the flange. The 

 commissure is not developed although the 

 lips are distinct. The spore coat is over 2 

 microns thick and the flange is very thin. 



Holotype. — Maceration 540-C Slide 6, 

 No. 6 coal bed, Fulton County, Illinois. 



Discussion. — This species was first ob- 

 served in No. 5 coal bed by A. L. Brokaw. 

 It is now known to be present in No. 6 

 coal and its range has been traced into the 

 lower part of the McLeansboro group. 



ClRRATRIRADITES DIFFORMIS Sp. nOV. 

 Plate 7, figure 3 



Description. — Spores are radial, trilete, 

 subtriangular to round in transverse plane, 

 with a definite large equatorial flange. 

 Occasionally the flange is folded or slightly 

 twisted. The holotype measures 63 X 53.5 

 microns and the known size range is from 

 52 to 68 microns. The spore coat is mildly 

 reticulate with ridges at the periphery of the 

 spore coat which anastomose in groups and 

 extend into the flange. The area between 

 the ridges of the flange is usually open but 

 occasionally it is filled by the matrix 

 of the flange or a reticulate network. The 

 spore body of the holotype measures 31.5 X 

 31.5 microns. The trilete mark is usually 

 distinct and extends beyond the body of the 

 spore and into the outer margin of the flange 

 in most cases. The commissure and lips 

 are only slightly developed. The spore coat 

 is about two microns in thickness and the 

 flange is much less although somewhat 

 variable. 



Holotype.— Maceration 625-B Slide 7, 

 Willis coal bed, Gallatin County, Illinois. 



