GEOLOGY AND PALEONTOLOGY OF THE CANAL ZONE. 53 



pressed, wall composed of rather coarse arenaceous material, aper- 

 ture extending into the base of the chamber in a narrow rounded 

 opening deeper than wide. 



Length 1.3 mm., breadth 0.85 mm. 



This species was fairly common from U.S.G.S. No. 6033c, the 

 Gatun formation, in marl from second bed from bottom, just below 

 lower clay, Gatun section, relocated line Panama Railroad. 



This species may be distinguished from TextuZa/ria agglutinins by 

 the truncated sides, the oblong end view and especially by the deep, 

 narrow aperture. 



Type specimen.— -Cat, No. 324812, U.S.N.M. 



TEXTULARIA CARINATA d'Orbigny. 



Plate 19, fig. 6. 



Textularm carinata d'Orbigny, Ann. Sci. Nat., vol. 7, 1826. p. 268, No. 23 : 

 Poram Foss. Bass. Tert. Vienne, 1846, p. 247, pi. 14, figs. 32-34. 



Description. — Test much compressed, rather abruptly tapering 

 toward the initial end, sutures strongly limbate, in well-preserved 

 specimens extending out from the periphery in angular spine-like 

 projections, aperture narrow, elongate. 



Length 1 mm., breadth 0.65 mm. Cat. No. 324613, U.S.N.M. 



The only material of this species is from U.S.G.S. No. 6036, from 

 the Gatun formation, a dark-colored, fine-grained, sandy clay marl 

 from Monkey Hill, Mount Hope Station. It is very evidently this 

 species and is well preserved. 



TEXTULARIA PANAMENSIS, new species. 



Plate 20, fig. 1. 



Description. — Test rhomboid in front view, very much compressed, 

 in end view long and narrow, the faces nearly parallel, sides rounded ; 

 composed of comparatively few chambers but variable; long and 

 low, sutures somewhat depressed, wall rather coarsely arenaceous; 

 aperture indistinct. 



Length 0.85 mm., breadth 0.65 mm. 



The figured specimen is from U.S.G.S. No. 6036, from the Gatun 

 formation, a dark-colored, fine-grained sandy clay marl from Monkey 

 Hill, Mount Hope Station. Specimens were common from U.S.G.S. 

 No. 6033c, in marl from second bed from bottom, just below lower 

 clay, Gatun section, relocated Panama Railroad. 



. This is a rather striking species, with its very flat, broad front 

 view and very compressed character of the test. 



Type-specimen.— Cob. No. 324614, U.S.N.M. 



