^19 Tertiary Foraminifera 25 



not remain constant, some specimens having only eight costa; be- 

 low and as many as twelve above; primordial chamber bulbous, 

 acuminate, though with the spine usually broken; segments reg- 

 ular, less distinct below, marked by straight transverse septa; 

 length, fragments of nine chambers measure five mm. 



Horizon and locality . — ^OQ^xi^\ Woodstock, Va. 



Geological distribution . — Tertiary . 



Nodosaria communis. . 



Syn. Dentaliiia communis d'Orbigny, Mem. Soc. geol. France, vol. iv, 



p. 13, pi. I, fig. 4, 1840. . 



Nodosaria comviunis Bagg, Jolins Hopkins Univ. Cnxulars, vol. 



XV, p. 5, 1895. 



Test elongate, smooth, with depressed oblique septa; prmior- 

 dial chamber larger than the one succeeding and in our speci- 

 men acuminate; ultimate chamber elongate, tube- like; transverse 

 se<5tion circular; aperture round, smooth; length 0.60 mm. 



NodosaricE are very rare in the Miocene of Maryland and I have 

 only one specimen of the above species. It possesses but three 

 chambers and is undoubtedly a young form. 



Horizon and locality . — Eocene; Sunnyside, Md. 



Geologicul distidbiition. — Permian to Recent. 



Nodosaria consobrina, var. emaciata. 



Syn. Nodosaria consobrina var. emaciata Reuss, Denkschr. Akad. Wiss. 

 Wien., vol. xxv, p. 132, pi. ii, figs. 12, 13, 1865. 



Test smooth, elongate, tapering, segments numerous, short, 

 elongate-oval; .'-imilar to Nodosaria consobrina \m\. more elongat- 

 ed and slender; septa somewhat depressed, transverse. The prox- 

 imal chamber is rounded and ends in a nipple-shaped aperture. 



Horizon and locality . — Eocene; Marlboro, Md. 



Nodosaria farcimen. 



Syn. 6'r//?6'r^;m/«7'-rzw^« Soldani, Testaceographia, vol. i, pt. 2, p. 98, 



pi. cv, fig. 0., 1791. 

 Nodosaria farcimen Brady, ChaL Rep't, vol. ix, p. 498, pi. Ixii, figs. 

 17, 18; (woodcuts, fig. 13, a, b, c,). 

 Test smooth, arcuate, tapering, with from six to ten inflat- 

 ed segments separated by deep, straight, transverse sutures. 

 The latter feature separates this species from Nodosaria com- 

 munis in which the sutures are oblique. There is also an ir- 

 regularity in the increase of the size of the chambers notice- 

 able in most specimens. Ultimate chamber prolonged into a 

 round tube which bears the oral opening; length 2.82 mm. (Cre- 

 taceous), 1. 10 mm. (Eocene). 



Specimens of the above species from the Cretaceous of New 



