38 Bulletin io 333 



mens show nine); inferior side distindlly stellate with depressed 

 septal lines and elevated chambers, the latter feature being char- 

 adteristic for the species, and distinguishing it from Pulvinulina 

 karsteni by lack of peripheral keel. The final chamber is larger 

 and more globose than the one adjohiing; umbilicus depressed on 

 inferior side; aperture a submarginal slit. 



Diameter, o. 4 — 0.54. 



This species is not uncommon in the Eocene of Woodstock but 

 seems to be quite rare in the Miocene of James river, Va. 



Professor Brady does not mention this species as occurring back 

 of the Miocene but states that it is common in the lateTertiaries of 

 Europe. 



Horizon and locality. — Eocene; Woodstock, Va.: Miocene; 

 James river, Va. 



Geological distribution. — Eocene to Recent. 



Genus ROTA LI A Lamarck. 

 Rotaliabeccarii. 



Syn. Nautilus beccarii L,inne, 1767, Syst. Nat., Ed. 12, p. 11 62; 1788, 



ibid. Ed. (Gmelen's) 13, p. 3370, No. 4. 

 Rotalia beccarii Williamson, 1858, Rec. Foram. Gt. Brit., p. 48, 



pi. iv. figs. 90 — 92. 

 Rotalia i^^rfffrzV Parker & Jones, Phil. Trans., vol. civ, p. 388, pi. 



xvi, figs. 29, 30, 1865. 



Test finely porous, formed of a nearly circular low turbinoid 

 spire, peripheral margin lobulated, obtusely rounded; chambers 

 numerous, ten to fortj^ somewhat inflated, about ten in the final 

 convolution, and separated by depressed nearly straight septal 

 lines. Convolutions about three, inferior surface thickened, and 

 often beaded with exogenous granules at the umbilicus. Aper- 

 ture a notched, subdivided opening or a series of pores at the 

 inner margin of the ultimate chamber. 



Diameter 0.34--0.74 mm. 



The above species is a shallow water form and is rather com- 

 mon in the Pleistocene formation at Cornfield Harbor. 



Ho7'izon and locality. — -Miocene; Darlington, S. C: Pleistocene; 

 Cornfield Harbor, Md. 



Geological distribution. — Miocene to Recent. 



Rotalia orbicularis. 



Syn. Rotalia {Gyroidina) orbicularis d'Orbigny, Ann. Sci. Nat., vol. 

 VII, p. 278, No. i; — Modele, No. 13, 1826. 

 Rotalia orbicularis Terquem, Mem. Soc. Geol. France, ser. 3, vol. 



