18 



about 1 xi thick. Dimensions (30 specimens) : 

 size range, 48.6 to 74.9 xt in maximum di- 

 ameter; median, 60.9 ft. 



Holotype. — Plate 1, figure 18; negative 

 6125; Fithian Cyclothem, maceration 1170-D, 

 slide 24, coordinates, 141.2 X 40.1; size, 58.3 

 by 52.2 /x. 



Paratypes. — Plate 2, figure 1 ; negative 

 6510; Fithian Cyclothem, maceration 1170-D, 

 slide 15, coordinates, 128.7 X 45.7; size, 60.5 

 by 56.9 /x. Plate 2, figure 2; negative 4800; 

 Trivoli Cyclothem, maceration 11 28- J, slide 

 11, coordinates, 132.5 X 55.5; size, 49.1 by 

 39.0 xt. 



Comparison. — Crassispora plicata differs 

 from C. ovalis (Bhardwaj) Bhardwaj, 1957b, 

 and C. kosankei (Potonie & Kremp) Bhard- 

 waj, 1957b, by having more distinct rays, by 

 lacking coni on the proximal surface, and by 

 having prominent apical papillae. Illustra- 

 tions of C. ovalis (Bhardwaj, 1957b, pi. 25, 

 figs. 73-75) show what might be interpreted 

 as apical papillae, but no mention of the 

 latter was made in the original description 

 of Planisporites ovalis or in the emended de- 

 scription of C. ovalis. 



Derivation of name. — The species name 

 refers to its characteristic folded (plicata) 

 appearance. 



Genus Cyglogranisporites 



Potonie & Kremp, 1954 



Table 1 



Type species. — Cyclogranisporites leopoldi 

 (Kremp) Potonie & Kremp, 1954. 



Affinities. — Psilopsida?, Filices (Potonie & 

 Kremp, 1954, p. 126). See also Puncta- 

 tis pontes. 



Genus Densosporites (Berry) Schopf, 



Wilson, & Bentall, 1944 



Plate 2, figures 3-6 



Type species. — Densosporites covensis Ber- 

 ry, 1937. 



Affinity. — Lycopsid. Chaloner (1958b) de- 

 scribed an Upper Carboniferous, minute, 

 probably herbaceous, lycopod cone, Selagincl- 

 lites canonbiensis, containing Densosporites 

 microspores. In 1962 he described micro- 

 spores resembling D. Solaris Balmc, 1952, 



from a lycopod cone, S porangiostrobus ohio- 

 ensis Chaloner. Densosporites from a lycopsid 

 cone, Porostrobus zeilleri Nathorst, 1934, were 

 reported by Bhardwaj (1958). 



Densosporites cf. marginata Artuz, 1957 



Only one rather poorly preserved specimen 

 similar to Densosporites marginata was ob- 

 served in the samples studied for this report. 



Densosporites sp. 1 

 Plate 2, figure 3 



The spore is radial, trilete, and roundly 

 triangular in outline and has an irregular 

 margin. The rays are distinct and extend 

 to the inner margin of an equatorial thick- 

 ened zone that possesses widely spaced ver- 

 rucose projections about 2.5 /x in diameter 

 and puncta 1 to 2 /x in diameter. Lips are 

 well developed. The surface of the spore 

 body appears finely punctate under oil im- 

 mersion objective. 



Figured specimen. — Negative 6004; Trivoli 

 Cyclothem, maceration 1175-B, slide 8, co- 

 ordinates, 140.7 X 38.0; size, 48.0 by 40.5 /x. 



Densosporites sp. 2 

 Plate 2, figure 4 



The spores are radial, rectangular to oval 

 in outline, and have an irregular margin. No 

 haptotypic features were observed. The equa- 

 torial thickened zone thickens slightly toward 

 the poles and is about 8 xt wide. It is orna- 

 mented with irregularly scattered elliptical 

 pits in which the longest dimensions are trans- 

 verse to the margin. The surface of the spore 

 body is covered with well defined, closely 

 spaced pits 1 to 2 xt in diameter. Densosporites 

 sp. 2 is somewhat similar to D. triangularis 

 Kosanke, 1950, but has a narrower equatorial 

 thickened zone and is smaller. 



Figured specimen. — Negative 5920; Trivoli 

 Cyclothem, maceration 1175-C, slide 14, co- 

 ordinates, 129.7 X 33.7; size, 42.8 by 40.9 /x. 

 This species was also found in maceration 

 1175-D. 



Densosporites sp. 3 

 Plate 2, figure 5 



The spore is radial, trilete, and roundly 

 triangular in outline. The rays extend to the 

 inner margin of the equatorial thickened 



