30 Bulletin io 324 



London, vol. xxvii, p. 227, pL xl, fig. 12, a-f, 1870. 



' 'Shell oblong, inequilateral, compressed, more or less fusiform : 

 chambers numerous, arranged in two inequal series, somewhat in- 

 flated; septal lines depressed; surface smooth or faintly striated; a- 

 perture variable, usually simple, circular, coronate; sometimes lab- 

 yrinthic or porous"; length, from one twentieth to one tenth of an 

 inch; (Brady, Parker and Jones, loc. cit.); length 0.82-1.30 

 mm., breadth 0.43 mm. 



This species is very common in the Maryland Miocene beds 

 especiall}^ at Plum Point, Jones Wharf, Md., and also occurs in 

 the bluffs on the James river, Va. 



Horizon and locality .- — Eocene; Woodstock, Va. Miocene; Plum 

 Point. Md., Norfolk, Va. Well boring; depth, 685 feet. 



Geological distribution. — Lias to Recent. 



Polymorphina elegantissima. 



Syn. Polymorphina elegantissima Parker & Jones, Phil. Trans., vol. civ, 

 table X, p. 438, 1865. 

 Polytnorphina elegantissima Brady, Parker & Jones, Trans. Linn.' 

 Soc, London, vol. xxvii, p. 231, pi xl, fig. 15 a-c, 1870. 

 Test ovoidal, anterior end acute, posterior obtusely round- 

 ed; chambers four or five, elongate," arranged in an inequilater- 

 al biserial manner and overlapping in such a way that while 

 one side remains nearly flat the opposite is more or less irreg- 

 ularly vaulted and shows all the chambers in parallel arrange- 

 ment; final segment broad below, embracing, and bearing the 

 mammillate aperture upon the anterior end. Shell surface smooth, 

 finely perforate; length 0.60 mm., breadth 0.40 mm. 



Prof. Brady considers that Polymorphina problema var. del- 

 toidea Reuss, and Polymorphina anceps Reuss, are identical with 

 this species. 



/-forizon and locality. — Eocene; Woodstock, Va. 

 Geological distribntion . — Eocene to Recent. 



Polymorphina gibba. 



Syn. Globtilina gibba d'Orbigny, Foram. Foss, Vien., p. 227, pi. xiii, figs. 

 13, 14, 1846. 

 Polymorphina gibba Bagg, Johns Hopkins Univ. Circulars, vol. xv, 

 P- 5, 1895. 

 Test subglobular, apex slightly produced, base obtusely round- 

 ed, consisting of from two to four chambers compacftly joined 

 and overlapping. The surface is smooth and unmarked b\' sept- 



