248 CRETACEOUS PALEONTOLOGY. 



Sub-family POLYMORPHININAE. 



Genus Polymorphina d'Orbigny. 



Polymorphina compressa d'Orbigny. 

 Plate III., Fig. 20. 



1846. Polymorphina compressa d'Orbigny, Foram. Foss. Bassin 

 tert. Vienne, p. 233, pi. xii, figs. 32-34. 



1870. Polymoyphina compressa Brady, Parker and Jones,. 

 Trans. Linn. Soc. Lond., vol. 27, p. 227, pi. 40, figs. 

 12 a-f. 



1898. Polymorphina compressa Bagg, Bull. U. S. G. S., No. 88,. 

 p. 60. 



1898. PolymorpMna compressa Bagg, Bull. Am. Pal., vol 2,, 

 No. 10, p. 29 (323). 



1901. Polymorphina compressa B^gg, Md. Geol. Surv., Eocene, 

 p. 246, pi. 63, fig. 10. 



1904. Polymorphina compressa Bagg, Md. Geol. Surv., Mio- 

 cene, p. 476, pi. 133, fig. I. 



Description. — ^"Test oblong, compressed, inequilateral; cham- 

 bers numerous, arranged biserially, somewhat inflated; septal 

 lines depressed, surface smooth ; aperture variable, usually simple,, 

 circular, and coronate, sometimes labyrinthic or porous. 



"Length, 3 mm. in large specimens." (Bagg.) 



Pormation and locality. — Vincentown limesand, Vincentown 

 (Bagg). 



Geographic distribution . — New Jersey; Eocene of Virginia, 

 Miocene of Maryland and Virginia. 



Polymorphina communis (d'Orbigny). 

 Plate III, Fig. 18. 



1826. Guttnliiia communis d'Orbigny, Ann. Sci. Nat., Vol. vii, 

 p. 266, pi. xii, figs. 1-4; Modele, No. 62. 



1870. Polymorphina communis, Brady, Parker, and Jones, 

 Trans. Linn. Soc, London, vol. xxvii, p. 224, pi. xxxix, 

 fig. loa-b. 



