32 



slide 19, coordinates, 137.2 X 35.9; size, 33.4 

 X 26.9 fi. 



Paratype. — Plate 4, figure 11; negative 

 6149; Trivoli Cyclothem, maceration 1128-L, 

 slide 17, coordinates, 142.8 X 50.8; size, 30.2 

 by 27.9 ft. 



Derivation of name. — The species name is 

 derived from its resemblance to a bunch of 

 grapes (racemus) . 



Punctatisporites patulus sp. nov. 

 Plate 4, figures 12-13; text figure 8 



Diagnosis. — The spores are radial, trilete, 

 circular to roundly triangular in outline, and 

 often somewhat obliquely compressed. The 

 rays are straight, at least three-fourths the 

 length of the spore radius, and often indis- 

 tinct because of ornamentation. Lips are 

 poorly developed. The entire surface of the 

 spore coat is covered with closely spaced, 

 clavate, mushroom-shaped projections that 

 vary in size from less than 1 jut to 7.5 ju, long 

 and from less than 1 /x to 13 /x in diameter, 

 the smallest generally being in the polar areas. 

 In face view they are circular to subcircular 

 in outline. The projections extend beyond 

 the spore margin in one to three rows. In 

 well preserved specimens the outermost of 

 these rows is made up of very thin, trans- 

 parent projections that form a continuous, 

 scalloped, flange-like border around the en- 

 tire spore (text fig. 8). The innermost pro- 

 jections are considerably thicker, darker, and 

 distinctly separated. All gradations exist be- 

 tween well preserved forms and poorly pre- 

 served or over-macerated specimens in which 

 the thin, marginal projections are partly or 

 totally absent. The exine is 2 to 3 /x thick. 

 Dimensions (20 specimens) : size range, 36.0 

 to 49.6 /x in maximum diameter (not includ- 

 ing ornamentation) ; median, 44.5 /x. 



Holotype.- — Plate 4, figure 12; negative 

 6139; Henshaw Formation, maceration 1122- 

 E, slide 4, coordinates, 140.5 X 48.8; size, 



45.4 by 43.7 /x (not including ornamenta- 

 tion) . 



Paratype. — Plate 4, figure 13; negative 

 5269; Henshaw Formation, maceration 1122- 

 E, slide 5, coordinates, 142.6 X 48.1; size, 



40.5 by 40.5 /x. 



Discussion. — Bhardwaj (1955, p. 125) as- 

 signed spores with clavate (mushroom- 



FIG. 8 — Punctatisporites patulus sp. nov.; dia- 

 grammatic reconstruction of holotype; 45.4 

 by 43.7 n. 



shaped) projections in the genus Convoluti- 

 spora. As proposed by Hoffmeister, Staplin, 

 and Malloy (1955a, p. 384), however, the 

 genus includes spores ornamented with anas- 

 tomosing convoluted ridges rather than indi- 

 vidual projections. Punctatisporites patulus 

 therefore was not assigned to Convolutispora. 



Comparison. — Punctatisporites patulus is 

 larger and has coarser, more closely spaced 

 projections than P. bondensis, which it re- 

 sembles. 



Derivation of name. — The species name re- 

 fers to its expanded (patulus), clavate pro- 

 jections. 



Punctatisporites breviornatus sp. nov. 

 Plate 4, figures 14-15 



Diagnosis. — The spores are radial, trilete, 

 circular in outline, and usually folded. The 

 commissure is distinct, often open, and with- 

 out lips. The rays are 14 to 26 /x long. The 

 proximal and distal surfaces are indistinctly 

 punctate to granulate under high dry ob- 

 jective. The puncta and coni are 1 ^ or less 

 in diameter, and the spore coat is 3 to 4.5 

 /x thick. Dimensions (16 specimens) : size 

 range, 48.0 to 58.7 /x in maximum diameter; 

 median, 54.0 tt. 



Holotype. — Plate 4, figure 14; negative 

 5952; Trivoli Cyclothem, maceration 1175-G, 

 slide 6, coordinates, 137.5 X 45.5; size, 55.1 

 by 48.6 ^ 



Paratype. — Plate 4, figure 15; negative 

 6429; Trivoli Cyclothem, maceration 1175-C, 





