10 PROCEEDINGS OF THE NATIONAL MUSEUM vol.76 



This small almost spherical species is cosmopolital and ranges from 

 the Jurassic ^ to the recent seas. It has not been met with before in 

 the Ripley. 



Plesiotyve.—Q2.i. No. 73678, U.S.N.M. 



POLYMORPHINA GUTTA d'Orbigny 



Plate 1, Figure 11 



Pymliim gutta d'Orbigny, 1826, Ann. Sci., vol. 7, p. 267, No. 28, pi. 12, figs. 5-6. 



Poll/morphia, (Pip'ulina), gutta. Parker and Jones, 18G3, Ann. Mag. Nat. 



Hist., ser. 3, vol. 12, p. 440, No. 21. — Frankb, 1925, Foram. pommerschen 



Kreide, Abh. geol.-paleon. Inst. U. Griefswald, vol. 6, p. 77, pi. 6, figs. 



16a— &. 



Test elongate, more or less rounded, cylindrical initial end 

 rounded, apertural end obtusely pointed, chambers fairly numerous, 

 4—5 in adult specimens, smooth, elongate, sutures distinct level, last 

 formed chamber bearing a well-developed entirely radiate aperture, 

 wall smooth, translucent. 



Length, 0.80 mm. 



This form, which is rather common in this material, is a very 

 beautiful one. It has not been found before in the Cretaceous of the 

 United States, so far as I know. 



Plesiotype.— Cat. No. 736T9, U.S.N.M. 



POLYMORPHINA AMPLA Karrer 



Plate 1, Figure 4 



Polyfmorphina ampla Karker, 1870, IJber ein neues Vorkommen von oberer 

 Kreide in Leitzerdorf bei Stockerau und der Foraminifera-Fauna. — Eggkr, 

 1902, Abh. d. II. CI. d. k. Akad. d. Wiss. XXI, vol 1. Abtb., p. 126. pi. 17, fig. 

 32. 



Test fairly large, rounded elongate, decidedly compressed; cham- 

 bers few usually about 5-7 ; obliquely placed ; sutured distinct, level, 

 slightly limbate; wall thin, perforate, smooth; aperture terminal, 

 radiate. 



Length, 1.56 mm. 



This is the largest Poli/morphina found in this material. Its 

 large size and flattened condition readily set it off from any others 

 occurring in the formation. It has not before been recorded from 

 the American Cretaceous. 



Plesiotype.— Cat. No. 73680, U.S.N.M. 



5 Moore, Quart. Jour. Geo!. See, vol. 27, pp. 236, 239. 



