96 PROCEEDINGS OF TPIE NATIONAL MUSEUM vol.77 



Test but little compressed, elongated, the greatest breadth in the 

 upper half, gradually tapering toward the base, initial end obtuse; 

 chambers rounded, but little embracing, arranged at first in a quin- 

 queloculine series, abruptly becoming biserial, in full grown specimens 

 the later ones tending to become somewhat uniserial, each succeeding 

 chamber very much farther removed from the base; sutures much 

 depressed, very distinct; wall thick, smooth; aperture radiate. 



Length of figured specimen 2.20 mm.; breadth 0.65 mm.; thickness 

 0.50 mm. 



In general appearance this species is almost identical with Pseudo- 

 polymorphina parva excepting its slightly more rounded initial end. 

 It may be possible that the present species is the megalospheric form 

 of P. parva. However, as we have no European or topotype speci- 

 mens representing P. parva, we can not deiSnitely say that they are 

 the same species. Therefore until we examine the original specimen 

 P. doanei is kept as a good species and is described here. 



It is only known from the Pleistocene and Pliocene of California, 

 in which it is rather common. 



Galloway and Wissler described it from the lower bed at the 

 D. M. S. and B. quarry, and noted its occurrence in the Pliocene of 

 Timms Point, San Pedro, Calif. We have a series of specimens from 

 both of these localities. 



PSEUDOPOLYMORPHINA DECORA (Reuss) 



Plate 24, figures 6-8 



Polymorphina decora Reuss, Bull. Acad. Roy. Sci. Belg., ser. 2, vol, 16, 1863.- 



p. 152, pi. 3, fig. 41. 

 Polymorphina. texana Cushman and Applin, Bull. Amer. Assoc. Petr. Geol., 



vol. 10, 1926, p. 173, pi. 9, figs. 1, 2. 



Test elongated, more or less compressed, periphery rounded, sides 

 nearly parallel; chambers somewhat longer than wide., slightly em- 

 bracing, alternating, arranged in a nearl}^ biserial series from the 

 start; sutures not depressed, distinct; wall smooth; aperture radiate. 



Length 0.75-LlO mm.; breadth 0.32-0.36 mm.; thickness 0,15-0.18 

 mm. 



Polymorphina decora, figured by Reuss from the Crag of Antwerp, 

 is evidently a young, few-chambered specimen. An adult many- 

 chambered specimen is much elongated with the sides almost parallel. 



It resembles Pseudopolymorphina spatulata (Terquem) in its gen- 

 eral appearance, but the latter has a thicker test with rather inflated 

 chambers and slightly depressed sutures. These differences are not 

 very distinctive, and there are transitional forms. 



Distribution. — Rather common in the Miocene deposits near 

 Bordeaux. Somewhat similar specimens occur in the Eocene of 

 France. 



