270 FORAMINIFERA 



casionally entire specimens without divisions and like Spirillina, 

 later ones usually divided into long chambers often w^ith internal 

 sinuous septa ; wall calcareous, perforate, thin ; aperture elongate 

 at the base of the ventral side of the chamber. 

 Lower Cretaceous to Recent. 



Genus PATELLINELLA Cushman, 1928 



Plate 53, figure 15 



Genoholotype, Tcxtularia inconspicua H. B. Brady 



PatellineUa Cushman, Contr. Cushman Lab. Foram. Res., vol. 4, 1928 



p. 5. 

 Textularia (part) of authors (not Defrance). 

 Discorbis (part) Cushman (not Lamarck). 



Test conical, trochoid ; chambers in the adult with two making 

 up each whorl; wall calcareous, perforate; aperture on the 

 ventral side, umbilical. 



Tertiary and Recent. 



Genus DISCORBIS Lamarck, 1804 



Plate 39, figures 5, 9, 10; plate 41, figure 4 



Genotype, by designation, Discorbis vesicnlaris Lamarck 



Discorbis Lamarck, Ann. Mus., vol. 5, 1804, p. 183. 



Rosalind d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 271 (genotype, by 



designation, Rosalina globidaris d'Orbigny). 

 T'urbinulina (part) d'Orbigny, 1826. 

 AUothcca Ehrenberg, Abhandl. k. Akad. Wiss. Berlin, 1841, p. 407 



(genoholotype, Allotheca megathyra Ehrenberg). 

 Phanerostomum Ehrenberg, 1. c, p. 409 (genotype, by designation, 



Phanerostotnum iyitegerrimiim Ehrenberg). 

 Platyoecus Ehrenberg, Mikrogeologie, 1854, pi. 30, fig. 28 (genoholotype, 



Platyoecus squcDiia Ehrenberg). 

 Aristerospira Ehrenberg, Monatsber. k. preuss. Akad. Wiss. Berlin, 



1858, p. 11 (genotype, by designation, Aristerospira isoderma 



Ehrenberg). 

 Discorbina Parker and Jones, in Carpenter, Parker and Jones, Introd. 



Foram., 1862, p. 203 {genotype, Rotalia (Trochulina) titrbo d'Orbigny). 



Test typically planoconvex, the ventral side flattened, early 

 portion sometimes showing a long SinriUina-\ike second chamber 

 before division ; chambers often produced to partially cover the 

 umbilical area; wall calcareous, perforate; aperture at the base 

 of the umbilical margin on the ventral side of the chamber. 



Lower Cretaceous to Recent — possibly Carboniferous. 



