192 FORAMINIFERA 



Test with the earliest chambers close coiled, later uncoiling, 

 usually triangular in transverse section; aperture as in Rohulus. 

 Jurassic to Recent. 



Genus LINGULINA d'Orbigny, 1826 



Plate 24, figures 6, 7; plate 25, figure 3 

 Genotype, by designation, LivcjuUva carinatu d'Orbigny 



Lhujidina d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 256. 



NodoHaria (Mucronina) d'Orbigny, 1. c, p. 256 (genoholotype, Nodosaria 

 (Mucrnnina) hastata d'Orbigny). 



LmguUno'psis Reuss, Sitz. K. bohm. Ges. Wiss., 1860, p. 23 (genoholo- 

 type, Linguli7iopsis bohemica Reuss). 



Test in the early stages, at least in the microspheric form, 

 planispiral, later ones in a rectilinear series, compressed; aper- 

 ture becoming elongate, elliptical. 



Permian to Recent. 



Genus VAGINULINA d'Orbigny, 1826 



Plate 24, figures 21-23; plate 25, figure 11 

 Genotype, by designation. Nautilus legumen Linne 



Vagmulina d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 257. 

 NcmfUus (part) Linne, Syst. Nat., Ed. 10, 1758, p. 711. 



Test compressed, usually with one side of the test straight, 

 representing the periphery in the coiled forms, the other typical- 

 ly convex; sutures oblique, highest on the straight side of the 

 test; aperture at or near the peripheral angle. 



Jurassic to Recent. 



Genus FRONDICULARIA Defrance, 1824 



Plate 24, figures 24-27; plate 25, figure 12 



Genoholotype, Frondicularia complanata Defrance 

 Frondicularia Defrance, Diet. Sci. Nat., vol. 32, 1824, p. 178. 

 Test much compressed, in the early stages planispiral, at least 

 in the microspheric form, later chambers extending back on the 

 two sides of the test forming inverted V-shaped chambers ; aper- 

 ture in the early stages peripheral, gradually becoming terminal, 

 radiate. 



Permian to Recent. 



