4 PEOCEEDINGS OF THE NATIONAL MUSEUM vol. 7G 



This variety differs from the parent species in having a more 

 hyaline test. It is of small size and in this material it is poorly 

 preserved. The thin walls do not stand handling, and they are also 

 apparently partly dissolved by the water circulating through the 

 formation. It is a rather pretty variety and shows the arrowlike 

 form of the parent species. 



Holotype.—Csii. No. 73664, U.S.N.M. 



TEXTULARIA RIPLEYENSIS W. Berry, new species 



Plate 2, Figure 2 



Test elongate, tapering, small, ratio of length to width about 1.3 : 1, 

 Chambers, usually 10 in number in adult specimens, inflate, caus- 

 ing them to rise well above the area of the sutures, have a salient 

 angle on the margin, and are arranged biserially. Sutures dis- 

 tinct, depressed, causing chambers to be extremely well emphasized. 

 Wall arenaceous, with much cement. Aperture a simple arched slit 

 extending entirely across the interior face near the line of attach- 

 ment of the final chamber. 



Length, 0.55 mm. 



This species is related to T. carinata d'Orbigny, T. milletti Cush- 

 man, and T. tnexicana Cushman. Sandridge has described a similar 

 species in manuscript from the Ripley of Alabama, but, as I have not 

 been able to see either the specimens or the figures, I can not say 

 definitely that it is the same as this species from the Ripley of Coon 

 Creek. T. ripleyensis is fairly common in this material and should 

 be easily identified. 



Holotype.—Q^t. No. 73665, U.S.N.M. 



Genus BOLIVINA d'Orbigny, 1839 



BOLIVINA PLAITA Carsey 



Plate 1, Figure 14 



Bolwina plaita Carsey, Univ. Texas Bull. 2612, 1926, p. 26, pi. 4, fig. 2. 

 Proroporus plaita (Carsey) Cushman, Contrib. Cusli. Lab. Foram. Research, 

 vol. 2, pt. 4, 1927, p. 89, pi. 12, figs.7a-&. 



Test elongate, subcylindrical, very slightly compressed, apical end 

 rounded with a flat portion for the extreme end; chambers 

 numerous, usually about 15 in an adult specimen, higli, very slightly 

 inflate, arranged in an alternating biserial series; sutures nearly 

 flush, very slightly limbate, curving slightly in the direction of the 

 older chambers; wall hyaline, finely punctate, otherwise smooth 

 except for the limbate sutures; aperture loop-shaped, elongate; color 

 transparent to translucent white. 



Length, 0.94 mm. 



