42 



Genus Vesicaspora (Schemel) 

 Wilson & Venkatachala, 1963 



Type species. — Vesicaspora wilsonii Schem- 

 el, 1951. 



Affinities. — Gymnospermic ( Schemel, 1951, 

 p. 749). Possibly Caytoniales (Potonie and 

 Kremp, 1954, p. 175). 



Vesicaspora? sp. 1 

 Plate 7, figure 9 



The prepollen or pollen monosaccate grain 

 is dumbbell shaped in polar view. The body 

 is subcircular in outline. The bladder, which 

 is externally levigate and internally reticulate 

 to punctate, is greatly expanded at opposite 

 ends of the body so the grain appears almost 

 bisaccate. 



Figured specimen. — Negative 5676; Hen- 

 shaw Formation, maceration 1122-Z, slide 14, 

 coordinates, 130.6 X 31.2; size, total length 

 74.2 fi, body 48.9 by 47.0 li; bladder about 

 53.8 ii wide at the ends. 



Wilsonites delicata Kosanke, 1950 

 The size range of 81 to 98 ll given by 

 Kosanke (1950, p. 55) for Wilsonites deli- 

 cata is extended to include grains as small 

 as 58 /x. 



Wilsonites sp. 1 

 Plate 7, figure 11 



The prepollen grains are radial, trilete, 

 monosaccate, and subcircular in outline. The 

 body is subcircular, practically always oblique- 

 ly compressed, and usually folded along the 

 rays. The rays, usually indistinct, extend to 

 the margin of the body. The bladder is thick 

 (slightly thicker at the periphery) and com- 

 pletely surrounds the body. The bladder is 

 externally levigate and internally finely re- 

 ticulate. Dimensions: total size range about 

 45 to 62 ii. 



Figured specimen. — Negative 5896; Triv- 

 oli Cyclothem, maceration 1175-P, slide 8, 

 coordinates, 141.1 x 36.6; size, total 55.1 by 

 48.0 ix, body 38.3 by 35.7 tx. 



Genus Vestigisporites (Balme & 

 Hennelly) Hart, 1960 



Type species. — Vestigisporites rudis Balme 

 & Hennelly, 1955. 



Affinity. — Unknown; probably gymnosper- 

 mic. 



Vestigisporites sp. 1 

 Plate 7, figure 10 



The prepollen grain is bilateral, monolete, 

 and monosaccate. The suture is straight, 

 open, and 26 ll long. The bladder, drawn in 

 around the margin of the body, is externally 

 levigate and internally finely reticulate. The 

 body appears granulate under oil immersion 

 objective. 



Figured specimen. — Negative 5665; Hen- 

 shaw Formation, maceration 1122-Z, slide 

 16 ZB, coordinates, 123.2 X 45.9; size, total 

 85.7 by 71.0 Li, body 48.7 by 43.5 ix. 



Genus Wilsonites Kosanke, 1950 



Wilsonites vesicatus Ko- 



Type species 

 sanke, 1950. 



Affinity. 

 p. 13). " 



-Gymnospermic (Kosanke, 1950, 



MISCELLANEOUS 

 SMALL SPORES 



Bisaccate grain 1 

 Plate 7, figure 12 



The pollen or prepollen grain is bilateral 

 and has two small bladders attached to op- 

 posite sides of a subcircular body. A heavy 

 meridial fold and at least five indistinct 

 grooves occur on the body. The body is thick- 

 est at the periphery and is discernibly very 

 finely punctate when examined under oil im- 

 mersion objective. The bladders are exter- 

 nally levigate and internally coarsely reticu- 

 late. 



Figured specimen. — Negative 5640; Hen- 

 shaw Formation, maceration 1122-G, slide 

 9 T, coordinates, 134.8 X 31.2; size, total 

 length 77.8 ii, body 55,1 by 48.7 ii., bladders 

 about 38 by 32 ii. 



Bisaccate grain 2 

 Plate 7, figure 13 



The pollen or prepollen grains are bilateral 

 and elliptical in outline and have a sub- 

 circular body. The crescent-shaped bladders 

 almost join to form a distal furrow. The body 



