FAMILY 9. TEXTULARIIDAE 115 



Gravimostovium (part) of authors. 



Palaeotextularia Schubert, Pal. Zeitschr., vol. 3, 1920, p. 183 (genotype, 

 by designation, Textularia joyiesi H. B. Brady). 



Test free, elongate, tapering, usually compressed with the 

 zig-zag line between the chambers on the middle of the flattened 

 sides, early chambers in the microspheric form usually plani- 

 spirally coiled, later biserial, chambers simple, not labyrinthic; 

 wall arenaceous, the relative amount of cement varying much; 

 aperture, typically an arched slit at the inner margin of the 

 chamber, occasionally in the apertural face. 



Cambrian to Recent. 



Many things have been included by various authors under 

 Textularia, but it should be limited to those biserial species with 

 typically arenaceous tests. 



Genus TEXTULARIOIDES Cushman, 1911 



Plate 11, figure 5; plate 13, figure 5 

 Genoholotype, Textularioides inflata Cushman 



Test similar to Textularia but attached, the attached side 

 somewhat flattened. 

 Recent. Off Japan. 



Genus TEXTULARIELLA Cushman, 1927 

 Plate 11, figures 6-8; plate 13, figure 3 



Genoholotype, Textularia barrettii Jones and Parker 



Textulariella Cushman, Contr. Cushman Lab. Foram. Res., vol. 3, 1927, 



p. 24. 

 Textularia Jones and Parker (not Defrance), Rept. British Assoc, 



1863, p. 80. 



Test similar to Textularia, but usually circular in outline and 

 the chambers labyrinthic; wall smoothly finished due to the 

 large proportion of cement. 



Cretaceous to Recent. 



The species are often of considerable size as is usual in the 

 case of labyrinthic forms. 



