b PROCEEDINGS OF THE NATIONAL MUSEUM vol.76 



Genus DENTALINA d'Orbigny, 1826 



DENTALINA COMMUNIS d'Orbigny 



Plate 2, Figure 10 



Nodosaria {Dcntalina) communis d'Orbigny, Ann Sci. Nat., vol. 7, 1826, p. 



254, No. 35. 

 Denialina communis d'Orbigny, Mem. See. Geol. France, vol. 4, 1840, p. 13, 



pi. 1, fig. 4. — H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 



504, pi. 62, figs. 19-22.— CusHMAN, Foram. Philippine and Adj. Seas, U. S. 



Nat. Mus. Bull. 100, 1921, pp. 192-193, pi. 34, fig. 7. 



Test elongate, moderately slender, tapering very slightly, com- 

 pressed, rounded at the apical end; early chambers broader than 

 long, increasing gradually in length until the final chambers are 

 about one-third longer than broad, numerous, usually 8-9; surface 

 smooth, polished; aperture eccentric on a slight protuberance. 



Length, 0.55 mm. 



This is the only Dentalina found in this material. It is easily 

 recognized, and as far as I know has not been found in the Cretaceous 

 of the United States except by Bagg * in the Mommouth and Ran- 

 cocas formations of New Jersey. 



Plesiotype.—C^t No. 73669, U.S.N.M. 



Genus NODOSARIA Lamarck, 1812 



NODOSARIA AFFINIS d'Orbigny 



Plate 1, Figure 8 



Nodosaria ai^inis d'Orbigny, Foram. Foss. Vieune, 1846, p. 39, pi. 1, figs. 

 36-39.— Plummer, Univ. Texas Bull. 2644, 1926, p. 89, pi. 14, figs. 2o-d. 



Test elongate, tapering, composed of numerous subcylindrical, oval 

 chambers fairly closely connected; walls ornamented with heavy 

 longitudinal costae running the entire length of the test, sutures de- 

 pressed but filled with clear material over which the costae run; 

 apical end usually terminated with a spine, aperture on the extreme 

 end of a short neck. 



Length, greater than 1.80 mm. 



Nodosaria afjinis is rather common in the Ripley of Coon Creek. 

 It is easy to see, due to its large size and its usual white color. It 

 has been described from the Midway of Texas, and under other names 

 similar forms have been described from the Lias to the recent. In 

 this material it shows constant characters which would tend to show 

 that there is every reason to call it a fixed species at least in this 

 area. 



Plesiotype.—Cai. No. 73670, U.S.N.M. 



* Bull. 88, U. S. Geol. Survey, p. 37. 



