37 



lete rays, often indistinct due to ornamenta- 

 tion, are about 26 /x long and lack lips. The 

 surface of the spore coat is ornamented with 

 processes that are widest in the middle, al- 

 though occasional processes are rather uni- 

 form in width. The maximum length and 

 width of the processes observed is 13 and 

 6.5 fi, respectively. The ends of most of the 

 processes have numerous minute divisions 1 

 or 2 ft long. In end view, the processes are 

 subcircular in outline. Between 20 and 25 

 processes extend beyond the spore margin. 

 The spore coat is 1.5 to 2 /x thick and with 

 oil immersion objective appears smooth be- 

 tween the processes. Dimensions (4 speci- 

 mens) : size range, 64.9 to 74.6 /x in maxi- 

 mum diameter (not including ornamenta- 

 tion) . 



Figured specimen. — Negative 5622; Hen- 

 shaw Formation, maceration 1122-A, slide 

 10, coordinates, 131.1 X 31.7; size, 64.9 by 

 55.5 /x. This species was also found in ma- 

 ceration 1122-E and in the Trivoli Cyclo- 

 them, macerations 1175-1 and 1175-B. 



Raistrickia sp. 2 

 Plate 6, figure 1 



The spores are radial, trilete, and subcircu- 

 lar in outline. The rays are distinct and 

 about 34 [i long. The proximal and distal 

 surfaces are covered with spines 5 to 10 /a 

 long and about 4 /x wide at their bases. The 

 spines taper toward pointed or gently round- 

 ed ends and are transversely striated. 



Figured specimen. — Negative 5741 ; Fithian 

 Cyclothem, maceration 1170-B, slide 12, co- 

 ordinates, 133.8 X 40.6; size, 57.8 by 55.8 /x. 

 This species was also found in maceration 

 1170-B. 



Raistrickia sp. 3 

 Plate 6, figure 2 



The spore is radial, trilete, and circular 

 in outline. Rays are distinct and about 29 /x 

 long. Proximal and distal surfaces are cov- 

 ered with closely packed projections 5 to 

 10.5 /x long and 5 to 13 /x wide. The ends 

 of the projections are split into numerous sub- 

 divisions. The exine is about 2.5 /x thick. 



Figured specimen. — Negative 6114; Trivoli 

 Cyclothem, maceration 1128-G, slide 5, co- 

 ordinates, 126.5 x 46.0; size, 81.1 by 78.5 /x. 



Genus Reinschospora Schopf, Wilson, & 



Bentall, 1944 



Plate 6, figures 3-4 



Type species. — Reinschospora bellitas Ben- 

 tall, 1944 (in Schopf, Wilson, and Bentall, 



1944). 



Affinity. — Unknown, possibly filicinean 

 (Schopf, Wilson, and Bentall, 1944, p. 53). 



Reinschospora sp. 1 

 Plate 6, figure 3 

 The spore is radial, trilete, triangular in 

 outline, and has strongly concave interradial 

 sides. The well rounded corners opposite the 

 rays are folded back over the proximal sur- 

 face. The rays are distinct and extend al- 

 most to the margin. The well developed lips 

 on either side of the commissure are about 

 1.5 /x wide. The processes, about 40 along 

 each interradial side, vary in length from 

 about 4 /x at the corners to 17 /x midway be- 

 tween the radii. They are embedded as much 

 as 5 /x in the proximal side of the spore coat. 

 The processes, 1 to 2 //. wide at their bases, 

 gradually taper toward their ends, some of 

 which terminate in small knobs. The surface 

 of the exine appears levigate under oil im- 

 mersion objective. Reinschospora sp. 1 has 

 interradial sides that are more strongly con- 

 cave, processes that are not as deeply em- 

 bedded in the spore coat, and better devel- 

 oped lips than R. magnifica Kosanke, 1950, 

 which it otherwise resembles. 



Figured specimen. — Negative 6517; Trivoli 

 Cyclothem, maceration 1128-L, slide 10, co- 

 ordinates, 126.7 X 61.0; size, 55.3 by 51.0 jw. 

 (including processes) . This species also was 

 found in maceration 1175-1. 



Reinschospora triangularis Kosanke, 1950 

 Plate 6, figure 4 



Genus Reticulatisporites (Ibrahim) 



Schopf, Wilson, & Bentall, 1944 



Plate 6, figures 5-6 



Type species. — Reticulatisporites reticulatus 

 (Ibrahim) Ibrahim, 1933. 



Affinities. — Sphenopsid (Schopf, Wilson, 

 and Bentall, 1944, p. 34), Sphenophyllales, 

 Hepaticae (Kosanke, 1950, p. 26). Mamay 

 (1954, p. 234-235, pi. 14) described and il- 



