330 FORAMINIFERA 



calcareous, coarsely perforate; apertures formed by the coarse 

 perforations of the test. 

 Late Tertiary and Recent. 



Genus GYPSINA Carter, 1877 



Plate 52, figure 5 

 Genotype, by designation, Orhitolina vesicularis Parker and Jones 

 Gypsina Carter, Ann. Mag. Nat. Hist., ser. 4, vol. 20, 1877, p. 173. 

 Orhitolina (part) of authors. 

 Tinoporus (part) of authors. 

 Ceriopora (part) of authors. 



Test, a generally spherical mass of compressed chambers, 

 sometimes arranged in more or less radial rows ; apertures formed 

 by the coarse pores of the wall. 



Cretaceous to Recent. 



This family is closely related to the Anomalinidae but the re- 

 lationship in the free forms is seen only by a study of the early 

 chambers. In such forms as Planorbulinella and Linderina, the 

 early stages are seen toward the development of the complex 

 forms of the Orbitoididae. 



FAMILY 43. RUPERTIIDAE 



Test in the early stages, trochoid, attached by the dorsal side 

 as in Cibicides, later extending upward from the base of attach- 

 ment still keeping a loose spiral; wall calcareous, coarsely per- 

 forate; aperture either at the inner margin of the chamber or 

 becoming terminal and rounded, often with a neck and lip. 



Genus RUPERTIA Wallich, 1877 

 Plate 52, figures 10-13 

 Genoholotype, Rupcrtia stahilis Wallich 

 Rupertia Wallich, Ann. Mag. Nat. Hist., ser. 4, vol. 19, 1877, p. 502. 

 Test attached, in the young, trochoid, the chambers later ex- 

 tending upward from the base of attachment still keeping a loose 

 spiral ; wall calcareous, thick, coarsely perforate ; aperture in the 

 early stages narrow, at the base of the chamber, in later develop- 

 ment becoming much more open, rounded and with a thickened, 

 rounded lip. 

 Recent. 



