24 



ordinates, 144.6 X 46.5; size, 38.9 by 36.0 /i 

 (not including ornamentation) . 



Discussion. — The figured specimen shows 

 the relationship in Indospora between the 

 commissure and the distal ridges. Figure 5 

 is focused on the commissure to show over- 

 lapping of two of the rays across the distal 

 ridges. In figure 6 the distal ridges, elevated 

 toward the proximal surface, are in focus. 

 The figured specimen was found in macera- 

 tion 1122-DD, a coal not studied in detail 

 for this report, 50 feet below maceration 

 1122-E. 



Genus Knoxisporites 



Potonie & Kremp, 1954 



Table 1 



Type species. — Knoxisporites hageni Poto- 

 nie & Kremp, 1954. 



Affinity. — Unknown. 



Genus Laevigatosporites (Ibrahim) 



Schopf, Wilson, & Bentall, 1944 



Plate 3, figures 7-12 



Type species. — Laevigatosporites vulgaris 

 (Ibrahim) Ibrahim, 1933. 



Affinities. — Galamarian and filicinean. Ko- 

 sanke (1950, p. 28) pointed out that spores 

 of a calamarian fructification illustrated by 

 Reed (1938) and of Zeilleria, a fern (Florin, 

 1936), are possibly of the Laevigatosporites 

 type. Smooth, monolete spores were described 

 by Mamay (1950, p. 422, 434) from spo- 

 rangia of Marattiales ferns, Cyathotrachus 

 altissimus Mamay, 1950, and Scolecopteris 

 incisifolia Mamay, 1950. Remy (1960, p. 

 124) obtained spores of the L. ovalis type 

 from a fructification of Bowmanites nindeli 

 Remy, 1960, and B. simoni Remy, 1961 (p. 

 331-336). In addition, Laevigatosporites as 

 much as 105 /a long were recorded from a 

 fructification of Tristachya crockensis Remy 

 & Remy (1961, p. 220-223). 



Laevigatosporites crassus sp. nov. 

 Plate 3, figures 7-8 



Diagnosis.- — The spores are bilateral, mono- 

 lete, and oval to bean shaped in outline. 

 The. commissure, which is indistinct as viewed 

 from the distal surface, is straight and about 



two- thirds the length of the spore. The sur- 

 face of the spore coat has a rough appear- 

 ance under high dry objective. Under oil 

 immersion, the spore coat is mostly minutely 

 spinose but may appear as punctate, depend- 

 ing upon the spacing of the spines. The 

 spines are cone shaped and about as wide at 

 their bases as they are high. The spore coat 

 is 3 to 4.3 fi thick. Dimensions (6 specimens) : 

 size range, 33.4 by 28.5 to 43.6 by 32.5 /x; 

 median, 40.0 by 32.2 /x. 



Holotype. — Plate 3, figure 7 ; negative 5626; 

 Henshaw Formation, maceration 1122-G, 

 slide 3 T, coordinates, 133.2 X 49.6; size, 

 39.9 by 32.7 /x (not including ornamenta- 

 tion) . 



Paratype. — Plate 3, figure 8; negative 6469; 

 Henshaw Formation, maceration 1122-G, 

 slide 4T, coordinates, 140.6 X 34.4; size, 

 43.6 by 42.5 fx. 



Comparison. — Laevigatosporites crassus is 

 similar to Speciososporites laevigatus Alpern 

 (1959, fig. 353, p. 185), but the latter has 

 a longer monolete suture, and, according to 

 Alpern's description, is more nearly round 

 and levigate than L. crassus. The spore coat 

 of L. crassus is thicker than the "cingulum" 

 (thickness?) of S. laevigatus. S. plicatus Al- 

 pern (1959, figs. 354-355) is like S. laevi- 

 gatus and L. crassus, but is punctate or finely 

 granulate and has a folded central portion 

 and a suture that is often folded. 



Derivation of name. — The species name 

 refers to the thick (crassus) spore coat. 



Laevigatosporites papillatus sp. nov. 

 Plate 3, figures 9-10 



Diagnosis. — The spores are bilateral, mon- 

 olete, and bean shaped in outline. The 

 straight commissure, 19 to 22 /x long, is some- 

 times obscured by ornamentation or folding. 

 The exine is covered with minute papillate 

 projections, about 1 /x long and less than 

 0.5 /x in diameter, that are so closely spaced 

 that the number extending beyond the mar- 

 gin cannot be determined even under oil im- 

 mersion objective. The spore coat is 1 to 

 2 ft thick. Dimensions (14 specimens) : size 

 range, 31.1 by 22.7 to 36.0 by 22.7 xi; me- 

 dian, 32.6 by 24.4 /x. 



Holotype. — Plate 3, figure 9; negative 6509; 

 Henshaw Formation, maceration 1122-Q, 



