MARYLAND GEOLOGICAL SURVEY 215 



Description. — " Test subgiobular, elliptical or pyriform, smooth, an- 

 terior margin somewhat projecting; cells walls thin, hyaline, aperature in 

 an entosolenian neck; length 2.00 mm., breadth 1.50 mm." Bagg, 1898. 



Occurrence. — Talbot Formation. Wailes Bluff near Cornfield Har- 

 bor, St. Mary's County. 



Collection. — Maryland Geological Survey. 



Genus CRISTELLARIA Lamarck. 



Cristellaria rotulata (Lamarck) 



Plate LXVI, Fig. 10. 



Lenticulites rotulata Lamarck,, 1804, Ann. du Museum, vol. v, p. 188, No. 3; 

 Tableau Encyc. et Meth. pi. cccclxvi, fig. 5. 



Cristellaria rotulata Parker & Jones, 1865, Phil. Trans., vol. civ, p. 345, pi. 



xiii, fig. 19. 

 Cristellaria rotulata Bagg, 1898, Bull. Amer. Paleont., vol. ii, No. 10, p. 27. 



Description. — "Test involute, biconvex, smooth, peripheral' margin 

 sharp, noncarinate, chambers numerous, eight or nine in the last convo- 

 lution; septa moderately curved, visible externally as fine lines; aperture 

 elliptical, radiate." 



" The genus Cristellaria, although found so abundantly in the New 

 Jersey Cretaceous seems to be rather rare in the Atlantic Slope Tertiary 

 and is represented by only a few species." Bagg, 1898. 



Occurrence. — Talbot Formation. Wailes Bluff near Cornfield Har- 

 bor, St. Mary's County. 



Collections. — Maryland Geological Survey. 



Family ROTALIDAE. 



Genus ROTALIA Lamarck. 



Eotalia beccarii (Lamarck) 



Plate LXVI, Figs. 11-13. 



Nautilus beccarii Linne, 1767, Syst. Nat., ed. 12, p. 1162; ibid. ed. 



(Gmelin's) 13, p. 3370, No. 7. 

 Rotalia beccarii Williamson, 1858, Rec. Foram. Gt. Brit.z, p. 48, pi. iv, figs. 



90-92. 

 Rotalia beccarii Parker & Jones, 1865, Pbil. Trans., vol. civ, p. 388, pi. xvi, 



figs. 29, 30. 

 Rotalia beccarii Bagg, 1898, Bull. Amer. Paleont., vol. ii, No. 10, p. 38, pi. 



iii, figs. 3a, 3b, 3c. 



