472 SYSTEMATIC PALEONTOLOGY 



its more angular lateral edges, and differing from Textularia ahhreviata 

 d'Orb., which it also resembles, in being less short and thick. 



Occurrence. — Choptank Formation. Governor Eun, Jones Wharf. 



Collection. — Maryland Geological Survey. 



Textularia carinata d'Orbigny. 

 Plate CXXXII, Fig. 10. 



Textularia carinata d'Orbiguy, 1846, Foram. Fossiles Vienne, p. 247, pi. xiv, figs. 

 32-34. 



Description. — Test arenaceous, rather stoutly built and somewhat com- 

 pressed, but tapering rather narrowly at the posterior end so that it is 

 almost acuminate. The lateral margins are strongly carinate as in 

 Textularia articulata, from which it is with dijBQculty distinguished, and 

 it may well be doubted whether it is wise to separate the two as d'Orbigny 

 has done. It has somewhat strongly marginal extensions, however, and 

 these extensions are more broken and the sutures are less depressed. It is 

 closely allied to Textularia marginata but differs from it in the flanged 

 sides. 



D'Orbigny's specimens were from Nussdorf, Austria. 



Occurrence. — Choptank Formation. Jones Wharf. Calvert For- 

 mation. Chesapeake Beach, 



Collection. — Maryland Geological Survey. 



Textularia sagittula Defrance. 

 Plate CXXXII, Figs. 11, 12. 



Textularia sagittula Defrance, 1824, Diet. Sci. Hist., vol. xxxii, p. 177; vol. liii, 



p. 344; Atlas Conch., pi. xiii, fig. 5. 

 Textularia sagittula Bagg, 1898, Bull. Amer. Pal., No. 10, p. 20. 

 Textularia sagittula Bagg, 1901, Md. Geol. Survey, Eocene, p. 234, pi. Ixii, fig. 2. 



Description. — Test elongated, strongly compressed with sharp-angled 

 peripheral margins; chambers numerous, closely set, separated by short, 

 straight septal lines visible externally but not depressed. The aperture 

 is linear, terminal. Its geological distribution is from the Cretaceous 

 to the present time. 



Occurrence. — Choptank Formation. Jones MHiarf. Calvert For- 

 mation. Plum Point, Chesapeake Beach. 



Collection. — Maryland Geological Survey. 



