GENUS CALAMOSPORA 



41 



much in excess of the other species. These 

 two species are generally smaller than the 

 thin walled species C. perrugosus (Loose) 

 S. W. and B., 1944. However, in light 

 of Thompson's (1927) works this is not an 

 important consideration. 



The following are new species : 



1. C. breviradiata 



2. C. flava 



3. C. flexilis 



4. C. liquida 



5. C. pedata 



Calamospora breviradiata sp. nov. 

 Plate 9, figure 4 



Description. — Spores are radial, trilete, 

 originally spherical, and have folds general- 

 ly parallel to the margin of the spore. The 

 holotype measures 57.7 X 65.1 microns and 

 the known size range is from 52 to 71 

 microns. The trilete rays are short and 

 those of the holotype vary in length from 

 8 to 16 microns. The lips are distinct and 

 elevated while the commissure is thin and 

 attenuate. The area contagionis is devel- 

 oped. The spore coat is levigate and is not 

 over two microns thick. 



Holotype. — Maceration 579-B Slide 1, 

 No. 2 coal bed, Bureau County, Illinois. 



Discussion. — C. breviradiata sp. nov. is 

 characterized by relatively short rays and 

 highly developed lips. Also the presence 

 of the area contagionis is important although 

 not a feature restricted to this species. 



Calamospora flava sp. nov. 



Plate 9, figure 2 



Description.— Spores are radial, trilete, 

 spherical, and have occasional minor 

 folds. The holotype measures 107.1 X 

 119.7 microns and the known size range 

 is from 98 to 123 microns. The trilete 

 rays of the holotype vary in length from 

 27.3 to 33.6 microns. The lips are very 

 thin and elevated. Folds frequently are 

 associated with the lip, and are possibly due 

 to compression of the thick spore coat. 

 The commissure when visible is thin. The 

 spore coat is levigate, yellow, and 3.5 to 

 5.2 microns thick. 



Holotype. — Maceration 538-F Slide 8 

 (Macoupin coal bed?) diamond-drill core, 

 Jefferson County, Illinois. 



Discussion. — C. flava sp. nov. is distinct 

 from C. obesus (Loose) S. W. and B., 

 1944, although there can be little doubt 

 that they are closely related. 



Calamospora flexilis sp. nov. 

 Plate 9, figure 5 



Description. — Spores are radial, trilete, 

 spherical to roundly triangular and have 

 occasional folds frequently running parallel 

 with the rays. The holotype measures 69.3 

 X 64 microns, and the known size range is 

 from 58 to 70 microns. The trilete rays 

 of the holotype vary in length from 14 to 

 17 microns. The lips are slightly devel- 

 oped and elevated, however they are partly 

 obscured by folds. The commissure is thin 

 but definite. The spore coat is levigate, 

 appearing minutely punctate due to minor 

 irregularities of the spore coat. The spore 

 coat is 2 microns thick. 



Holotype. — Maceration 625-A Slide 1, 

 Willis coal bed, Gallatin County, Illi- 

 nois. 



Discussion. — C. flexilis sp. nov. is charac- 

 terized by its shape and folds associated 

 with the rays. 



Calamospora liquida sp. nov. 

 Plate 9, figure 1 



Description. — Spores are radial, trilete, 

 spherical, and have numerous plications 

 of the spore coat. The holotype measures 

 81.6 X 84 microns, and the known size 

 range is from 76 to 94 microns. The 

 plications are numerous and somewhat 

 parallel to the outline of the spore. The 

 trilete rays of the holotype are distinct and 

 vary in length from 26.2 to 31.5 microns. 

 The lips are moderately developed and def- 

 initely elevated. The commissure is usual- 

 ly thin but distinct. The area contagionis 

 is not present. The spore coat is levigate 

 and translucent. It is less than 2 microns 

 in thickness which probably accounts for 

 the numerous plications. 



Holotype. — Maceration 574 Slide 12, 



