FAMILY 31. BULIMINIDAE 249 



Grammobotrys Ehrenberg, 1. c, 1845, p. 368 (genoholotype, Grammobo- 



trys africana Ehrenberg). 

 Bidimina (part) of authors. 

 Polymorphina (part) of authors. 



Test elongate, more or less compressed fusiform, the early 

 chambers spiral about the elongate axis, triserial, later ones 

 becoming irregularly biserial, whole test usually twisted; wall 

 calcareous, finely perforate; aperture elongate, loop-shaped, 

 usually with an apertural tooth or plate and internal spiral tube. 



Lower Cretaceous to Recent. 



Genus BOLIVINA d'Orbigny, 1839 



Plate 36, figures 3-6; plate 37, figure 8 



Genotype, by designation, Bolivina plicata d'Orbigny 



Bolivina d'Orbigny, Voy. Amer. Merid., vol. 5, pt. 5, 1839, p. 61. 



Sagrina (?) d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, 

 "Foi-aminiferes", p. 149 (genoholotype, Sagrina pulchella d'Orbigny). 



Grammostomum Ehrenberg, Abhandl. k. Akad. Wiss. Berlin, 1838 

 (1840), p. 119 (genotype, by designation, Grammostomum tenue 

 Ehrenberg). 



Proroporus Ehrenberg, Bericht. k. preuss. Akad. Wiss. Berlin, 1844, p. 

 75 (genoholotype, Proroporus lingua Ehrenberg). 



Brizalina CosTA, Atti Accad. Pontaniana, vol. 7, pt. 2, 1856, p. 296 (geno- 

 holotype, Brizalina aenariensis Costa). 



Clidostomum Ehrenberg, 1. c, 1845, p. 358 (genoholotype, Clidostomum 

 polystigma Ehrenberg). 



Vulvulina (part) of authors. 



Virgulina (part) of authors. 



Test elongate, usually somewhat compressed, tapering from 

 the subacute or rounded initial end, which is often twisted; 

 chambers typically biserial ; wall calcareous, perforate ; aperture 

 elongate, usually oblique to the median plane, elongate, reaching 

 to the base of the chamber, often with a plate-like tooth con- 

 necting with an internal tube. 



Cretaceous to Recent. 



Genus RECTOBOLIVINA Cushman, 1927 



Plate 36, figures 7, 8; plate 37, figure 11 



Genoholotype, Sagrina bifrons H. B. Brady 

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

 p. 68. 



