19 



zone. Lips are poorly developed. The equa- 

 torial zone is levigate, very thick, translucent, 

 and 9 to 10 [i wide. The spore body is discern- 

 ibly granulate under oil immersion objective. 



Figured specimen. — Negative 5919; Trivoli 

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

 ordinates, 143.9 X 40.6; size, 37.9 by 33.7 ja. 



Densosporites sp. 4 

 Plate 2, figure 6 



The spores are radial, trilete, roundly tri- 

 angular in outline, and have a slightly irregu- 

 lar margin. The trilete rays are very indis- 

 tinct. The equatorial thickened zone, 8 to 

 9.5 fi wide, is set with widely scattered, low, 

 well rounded spines about 3 ju wide and 2 fi 

 high and elliptical pits less than 1 /x in diam- 

 eter. The proximal and distal surfaces of the 

 body are covered with circular, closely spaced 

 pits smaller than those of the equatorial zone. 



Figured specimen. — Negative 5581; Hen- 

 shaw Formation, maceration 1122-A, slide 

 15 ZB, coordinates, 138.8 X 43.8; size, 37.4 

 by 32.4 [x. This species was also found in the 

 Trivoli Cyclothem, maceration 1175-F. 



Genus Dictyotriletes (Naumova) 

 Potonie & Kremp, 1954 



Type species. — Dictyotriletes mediareticu- 

 latus (Ibrahim) Potonie & Kremp, 1954. 



Affinity. — Filices? ( Potonie & Kremp, 1954, 

 p. 144) . 



Dictyotriletes? camptotus Alpern, 1958 

 Plate 2, figure 7 



The spores encountered in this study that 

 resemble the specimen illustrated by Alpern 

 (1958, pi. 1, fig. 4) are provisionally assigned 

 to Dictyotriletes camptotus. A new genus 

 probably should be constructed for this taxon. 

 Most specimens observed lacked the well de- 

 fined reticulum on the distal side shown by 

 Alpern (1958, fig. 3). 



Genus Endosporites Wilson & Coe, 



1940 



Table 1 



Type species. — Endosporites ornatus Wil- 

 son & Coe, 1940. 



Affinity. — Lycopsid. Lepidostrobus zea 

 Chaloner, 1953a, a heterosporous lycopod, 

 was found by Chaloner (1953b, p. 109) to 

 have borne microspores identified as Endo- 

 sporites. In addition, Chaloner (1958c, p. 

 199-209) demonstrated that microspores from 

 a microsporangia of Polysporia mirabilis New- 

 berry, 1873, a lycopod cone, agree with the 

 genus Endosporites. 



Genus Florinites Schopf, Wilson, & 

 Bentall, 1944 



Type species. — Florinites antiquus Schopf, 

 1944 {in Schopf, Wilson, and Bentall, 1944). 



Affinities. — Gymnospermic, cordaitalean. 

 Schopf, Wilson, and Bentall (1944, p. 57) 

 pointed out the direct relationship between 

 Florinites and pollen of cordaitalean material 

 studied by Florin in the 1930s. Delevoryas 

 (1953, p. 146) found pollen grains of the 

 type assigned to Florinites from a male cor- 

 daitalean fructification. 



Florinites sp. 1 

 Plate 2, figure 8 



The prepollen grains are radial, subcircu- 

 lar to elliptical in outline, and usually folded. 

 On one specimen, grooves that may be trilete 

 rays were observed on the body. The bladder 

 is externally levigate and internally sharply 

 punctate to reticulate. Most specimens ob- 

 served are elliptical in outline and not circu- 

 lar like the obliquely compressed figured 

 specimen. Dimensions: size range, total 157.6 

 by 130.1 fi, body 98.3 by 90.8 jx. 



Figured specimen. — Negative 4745; Trivoli 

 Cyclothem, maceration 1128-1, slide 21, co- 

 ordinates, 136.9 X 51.9; size, total 124.9 by 

 115.1 /Xj body 96.7 by 64.9 [i. This species 

 was also found in maceration 1128-J. 



Genus Granulatisporites (Ibrahim) 



Schopf, Wilson, & Bentall, 1944 



Plate 2, figures 9-22 



Type species. — Granulatisporites granulatus 

 Ibrahim, 1933. 



Affinity. — Filicinean (Schopf, Wilson, and 

 Bentall, 1944, p. 32). Sporangia of Botryop- 

 teris illinoensis Mamay (1950, figs. 9-10) were 

 found to contain Granulatisporites-\ike spores. 



