AET. 6 FORAMINIFERA: POLYMORPHINIDAE — CUSHMAN AND OZAWA 101 

 PSEUDOPOLYMORPHINA PAUCICOSTATA Cushman and Ozawa, new species 



Plate 26, figures 4 o, fe 



Test compressed, elongated, greatest breadth in the upper half, 

 gradually tapering toward the initial end; chambers more or less 

 compressed, arranged in a biserial series; sutures slightly depressed, 

 distinct; wall thick, ornamented by a few low longitudinal costae, 

 which are often obscured; aperture radiate. 



Length of holotype 1.20 mm.; breadth 0.50 mm. 



Holotype.— {Cat. No. 371261, U.S.N.M.) From Midway Eocene, 

 U. S. G. S. Station 1/797, on west or downthrow side of fault, 2 miles 

 northwest of Lone Oak, Hunt County, Texas. 



Its more or less lance-shaped test and coarse longitudinal orna- 

 mentation are the important characteristics to separate the present 

 species from any others of the genus. 



PSEUDOPOLYMORPHINA OBSCURICOSTATA (Galloway and Wissler) (?) 



Plate 39, figure 6 



Polymorphina obscuricostata Galloway and Wissler, Journ. Pal., vol. 1, 

 1927, p. 56, pi. 9, fig. 12 (P. obscurocostata on explanation of plate). 



Test compressed, irregularly oval in side view; chambers few, com- 

 pressed, longer than wide, not much embracing, arranged in a biserial 

 series; sutures slightly depressed, distinct; wall ornamented with 

 about six low obscure costae to a side, extending from the rounded 

 initial end about two-thirds of the way to the aperture; aperture 

 radiate. 



Length of the specimen 0.22 mm.; width 0.13 mm.; thickness 0.05 

 mm. 



The present species is undoubtedly a young specimen of an orna- 

 mented Pseudopolymorphina. It resembles Pseudopolymorphina in- 

 dica and its variety, but the chambers are more elongated and the 

 costae are fewer; therefore we keep it as a good species. 



The above description is mainly copied from the original. 



Distribution. — Galloway and Wissler described the species from a 

 single specimen which is from the Pleistocene, middle bed, in the 

 D. M. S. and B. quarry, near Lomita, Palos Verdes Hills, Calif. 



PSEUDOPOLYMORPHINA VARIATA (Jones, Parker, and H. B. Brady) 



Plate 26, figures 5, 6 



Polymorphina variata Jones, Parker, and H. B. Brady, Foram. Crag, pt. 1, 

 1866, pi. 1, figs. 67, 68. — H. B. Brady, Parker, and Jones, Trans. 

 Linn. Soc, vol. 27, 1870, p. 237, pi. 40, fig. 24.— Jones, Foram. Crag, 

 pt. 2, 1895, pi. 5, fig. 27; pt. 3, 1896, p. 272. 



Test suboblong to oblong, compressed, the greatest breadth above 

 the middle; chambers rounded, compressed, arranged in an almost 

 biserial series from the beginning; sutures depressed, but not very 



