70 BULLETIN 103, UNITED STATES NATIONAL MUSEUM. 



strongly curved, somewhat limbate, periphery bluntly rounded, 

 slightly lobulated, especially near the apertural end of. the last 

 formed coil; wall coarsely punctate; aperture peripheral, a short 

 curved opening. 



Diameter of larger specimens slightly more than 1 nun- 

 Numerous very typical specimens of this species occurred in mate- 

 rial from the lower part of the Culebra formation, U.S.G.S. No. 

 0010, from dark clay, north of Pedro Miguel Locks. Less typical 

 specimens occurred in the upper part of the Culebra formation at 

 U.S.G.S. Q012d, from clay and sandstone just below conglomerate 

 at base of green clay, west side of Gaillard Cut, below Culebra ; and 

 6019/, from fourth limy bed from bottom, Las Cascadas section, 

 Gaillard Cut. 



Cat. Nos. 324670-2, IJ.S.N.M. 



TRUNCATULINA CULEBRENSIS, new species. 

 Plate 24, figs. 4a, 6. 



Description. — Test biconvex, much compressed, peripheral margin 

 rounded ; chambers numerous, as many as thirteen in the last formed 

 coil, long and narrow, gently curved, sutures broad, limbate, smooth, 

 the areas between very coarsely punctate ; apertural face of chamber 

 somewhat depressed, flattened, the carinate borders extending out 

 beyond at either side; aperture a narrow slit situated at the base of 

 the chamber on the periphery. 



Diameter up to 1.5 mm. 



The only occurrence of this species was in the upper part of the 

 Culebra formation, U.S.G.S. No. 6012c, from top part of limy sand- 

 stone below upper conglomerate near foot of stairs, west side Gail- 

 lard Cut. 



This, a large and striking species, in some of its characters sug- 

 gesting T. wuellerstorfi but, as will be seen by a comparison of the 

 figures of the two, really very different. 



Type-specimen.— -Cat.' No. 324673, U.S.N.M. 



Genus PULVINULINA Parker and Jones, 1862. 



PULVINULINA SAGRA (d'Orbigny). 



Plate 24, figs. 6a, 6. 



Rotalina sagra d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839. 

 Forarainiferes, p. 77, pi. 5, figs. 13-15. 



Description.— Test ovate, biconvex, the ventral side more convex 

 than the dorsal, peripheral margin subacute, carinate ; chambers com- 

 paratively few in number increasing rapidly in size in the last formed 



