236 SYSTEMATIC PALEOJ^TOLOGY 



Joseph Wright includes the genus Spiropleda in the list of Post- 

 Tertiaiy Foraminifera from the North of Ireland. 



The two specimens which the writer found at "Woodstock seem to be 

 new though they resemble S. difonnis of Parker and Jones. They are 

 separated from that species, however, by their sharp angular edges. . 



The distal end is more obtusely rounded than in Textularian types 

 and the chambers are less regularly developed. 



Occurrence. — Nanjemoy Poemation. Woodstock. 



Collection. — Johns Hopkins University.' 



Family LAGENIDAE. 

 Subfamily NODOSARIDAE. 



Genus NODOSARIA Defiance. 



jSTodosaria affinis (d'Orbigny). 



Plate LXII, Fig. 5. 



Deiitalina affinis d'Orbigny, 1S40, Mem. Soc. Geol. France, vol. iv, p. 13, pi. i, tig. 4. 

 Nodosaria affinis Sherborn and Chapman, 1886, Jour. Roy. Microsc. Soc., 3ud series, 



■vol. vi, p. 748, pi. xiv, fig. So. 

 Nodomria affinis Bagg, 1896, Bull. 141, U. S. Geol. Survey, p. 91. 

 Nodosaria affinis Bagg, 1898, Bull. Amer. Pal., No. 10, jj. 24. 



Description. — Test very large, nearly straight, more tapering than 

 Nodosaria hacillum, and without having the primordial chamber larger 

 than the succeeding one; proximal end acuminate; chambers numerous, 

 unconstricted below but becoming distinctly so above; surface marked 

 by about ten distinct elevated costae as in N. hacillum; aperture central, 

 elevated on the ultimate chamber. Length 9 mm. or more. 



Occurrence. — Nanjemoy' Formation. Woodstock. 



Collection. — Johns Hopkins University. 



Nodosaria bacillum Defrance. 

 Plate LXII, Fig. 6. 



Nodosaria bacillum Defrance, 1835, Diet. Sci. Nat., vol. xxxv, p. 127; vol. xxxvi, 



p. 487, Atlas Conch., pi. xiii, lig. 4. 

 Nodosaria bacillum Bagg, 1896, Bull. 141, U. S. Geol. Survey, p. 91. 

 Nodosaria bacillum Bagg, 1898, Bull. Amer. Pal., No. 10, p. 34. 



Description. — Test very large, straight or nearly so, surface marked 



by about ten very distinct snow-white costae, tliough tliis number does 



