43 



is covered with distinct, irregularly branched 

 fissures that vary in number from specimen 

 to specimen. Some specimens show several 

 strong grooves that may be trilete marks. 

 With oil immersion magnification, the body 

 between the fissures appears levigate. The 

 bladders are externally levigate and internal- 

 ly finely punctate to reticulate. 



Figured specimen. — Negative 5720; Fithian 

 Cyclothem, maceration 11 70- A, slide 13, co- 

 ordinates, 126.9 x 36.8; size, total length 

 51.6 ja, body 39.2 by 30.2 /x. This species was 

 also found in macerations 1170-B through 

 1170-E, and 1170-G. 



Monosaccate grain 1 

 Plate 7, figure 14 



The pollen or prepollen grain is broadly 

 elliptical in outline. A bladder covers the 

 distal surface of the body and the part of 

 the proximal surface where it is attached and 

 folded back to form a furrow. Two rays are 

 distinct and about 13 ^u. long, and a third 

 ray may be present. The bladder is exter- 

 nally levigate and internally finely reticulate. 



Figured specimen. — Negative 5538; Hen- 

 shaw Formation, maceration 1122-Q, slide 

 14, coordinates, 124.0 X 39.5; size, total 55.4 

 by 48.3 fi, body 50.6 by 35.1 /x. 



Monosaccate grain 2 

 Plate 7, figure 15 



The pollen or prepollen grain is bilateral, 

 trilete, and elliptical in outline. The body is 

 subcircular in outline and is folded. Two of 

 the distinct trilete rays are 12 it long and the 

 third is 3 fx long. The distal surface of the 

 body is polygonally areolate. The bladder is 

 externally levigate, internally finely punctate 

 to reticulate, and thickest around the pe- 

 riphery. 



Figured specimen. — Negative 5691 ; Fithian 

 Cyclothem, maceration 11 70- A, slide 4, co- 

 ordinates, 140.6 X 39.8; size, total 113.1 by 

 75.8 /x, body 69.4 by 55.1 /x. 



Monosaccate grain 3 

 Plate 7, figure 16 



The pollen or prepollen grain is bilateral, 

 trilete, and subcircular in outline. The ellipti- 

 cal body possesses distinct rays about 12 /x 



long. The bladder completely covers the dis- 

 tal surface and most of the proximal surface 

 of the body. A sulcus with a wide fold on 

 either side extends to the equator of the blad- 

 der. The surface of the body is levigate, and 

 the bladder is externally levigate and inter- 

 nally finely punctate. 



Figured specimen.— Negative 5601; Hen- 

 shaw Formation, maceration 1122-A, slide 

 22 ZB, coordinates, 140.4 x 48.0; size, total 

 48.7 by 42.2 n, body 35.7 by 24.4 /x. 



Monosaccate grain 4 

 Plate 7, figure 17 



The pollen or prepollen grain is radial, 

 trilete, roundly triangular in outline, and 

 folded. The rays are distinct and extend to 

 the spore margin. The body is completely 

 enclosed within a bladder that is externally 

 levigate and internally uniformly and sharply 

 punctate. The puncta are about 1 /x in di- 

 ameter. The bladder is about 3 /x thick and 

 tapers toward the margin. Ornamentation 

 of the body could not be determined because 

 it is obscured by the bladder. 



Figured specimen. — Negative 5557; Hen- 

 shaw Formation, maceration 1122-A, slide 5 

 ZB, coordinates, 140.0 X 49.5; size, total 51.9 

 by 43.1 fi, body 27.6 by 26.7 /x. 



Spore A 

 Plate 7, figure 18 



The spore is radial, trilete, and roundly 

 triangular in outline. The prominent lips are 

 contorted, about 3 it wide, and extend to 

 the spore margin at the corners. A thin, 

 coarsely reticulate flange completely sur- 

 rounds the body. As seen under oil immer- 

 sion objective, the proximal and distal sur- 

 faces of the body are finely reticulate. 



Figured specimen. — Negative 5998; Hen- 

 shaw Formation, maceration 1122-Q, slide 2 

 ZB, coordinates, 131.6 X 45.3; size, 93.4 by 

 85.0 p. 



Spore B 

 Plate 7, figure 19 



The spore is radial, trilete, roundly tri- 

 angular to subcircular in outline and in good 

 proximal-distal orientation. The trilete rays 

 and commissure are distinct and extend at 

 least three-fourths the length of the spore 



