GEOLOGY AND PALEONTOLOGY OP THE CANAL ZONE. 51 



DESCRIPTIONS OF SPECIES. 



Family TEXTULARIIDAE. 

 Genus TEXTULARIA Defrance, 1824. 



TEXTULARIA ABBREVIATA d'Orbigny. 



Plate 19, fig. 1. 



Textularia abbreviata d'Oebigny, Forarn. Foss. Bass. Tert. Vienne, 1846, 

 p. 249, pi. 15, figs. 9-12 (7-12). 



Description. — Test broad and short, somewhat compressed, cham- 

 bers comparatively few in number, broad near the center and taper- 

 ing to the periphery, sutures in these specimens indistinct, aperture 

 an arched slit extending nearly across the test, wall comparatively 

 smooth. 



Length 0.65 mm., breadth about 1 mm. Cat. No. 324608, TJ.S.N.M. 



Specimens from U.S.G.S. No. 6010, from the Culebra formation, 

 dark clay north of Pedro Miguel Locks. Apparently the material 

 is rather metamorphosed and more or less giauconitic so that little 

 of the original test is preserved. This is a rather common Tertiary 

 species. 



TEXTULARIA SAGITTULA Defrance. 



Plate 19, fig. 2. 



Textularia sagittula Defrance, Diet. Sci. Nat., vol. 32, 1S24, p. 177 ; vol. 53, 

 1828, p. 344 ; Atlas, Conch., pi. 13, fig. 5. 



Description. — Test elongate, tapering, much compressed especially 

 at sides, chambers numerous, sutures indistinct, aperture a curved 

 slit occupying about one-half the width of the base of the chamber. 



Length about 1.5 mm., breadth 1 mm. Cat. No. 324609, TJ.S.N.M. 



A few poorly preserved specimens from U.S.G.S. No. 6025, from 

 the Culebra formation, foraminiferal marl and coarse sandstone 

 about 200 yards south of southern end of switch at Bohio Ridge 

 station, relocated line, Panama Sailroad. 



Although this material is more or less giauconitic and poorly pre- 

 served the three specimens, one of which is here figured, are referred 

 with a reasonable degree of certainty to this species. 



A single fragmentary specimen from U.S.G.S. No. 6026, from the 

 Culebra formation, coarse, sandy foraminiferal marl about half way 

 between Monte Lirio and Bohio Ridge, relocated line, Panama Rail- 

 road, seems also to be this species. 



