276 FORAMINIFERA 



Genus EPISTOMINA Terquem, 1883 

 Plate 40, figure 6; plate 41, figure 10 

 Genotype, by designation, Epistomina regularis Terquem 

 Epistomina Terquem, Bull. Soc. Geo). France, ser. 3, vol. 11, 1883, p. 37. 

 Rotalia (Turbinulina) (part) d'Orbigny, 1826. 

 Pulvinulina (part) of authors. 

 Placentula Berthelin, 1882 (not Lamarck). 



Test trochoid, biconvex, umbilical area filled, all whorls visible 

 from the dorsal side, only the last-formed coil from the ventral 

 side; sutures usually limbate; wall calcareous, perforate; aper- 

 tures of two sorts, one at the inner margin of the ventral side 

 of the chamber or in the face itself, the other elongate, just 

 below the periphery and in the axis of coiling, in later growth 

 usually filled with clear shell material. 



Jurassic to Recent. 



Genus EPISTOMELLA Cushman, 1928 



Plate 54, figure 9 

 Genoholotype, Discorbiva rimo.sa Parker and Jones 

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

 p. 6. 



EXPLANATION OF PLATE 41 

 rotaliidae 

 Fig. 



1. Turrisjyirillma conoidea (Paalzow). (After Paalzow). 



2. Comcospirillina trochoides (Berthelin). (After Berthelin). 



3. Patellina corriigata Williamson. (After Williamson). 



4. Discorbis rosacea (d'Orbigny). (After H. B. Brady). 



5. Valvidineria catifornica Cushman. 



6. Lamarckina glabrata (Cushman), 



7. Gyroidina soldanii d'Orbigny. (After d'Orbigny). 



8. Rotaliatina mexicana Cushman. 



9. Eponides repandus (Fichtel and Moll). (After H. B. Brady). 



10. Epistomina elegans (d'Orbigny). (After H. B. Brady). 



11. Siphonina reticulata (Czjzek). (After H. B. Brady). 



12. Siphoninoides echinata (H. B. Brady). (After H. B. Brady). 



13. Siphoninella solnia (H. B. Brady). (After H. B. Brady). 



14. Cancris auriculus (Fichtel and Moll). (After H. B. Brady). 



15. Baggina californica Cushman. 



16. Rotalia trochidiformis Lamarck. (After Terquem). 



(In all figures: a, ventral view; b, peripheral view; c, dorsal view). 



