166 FORAMINIFERA 



Genus PLANISPIRINA Seguenza, 1880 

 Plate 20, figures 9, 10; plate 21, figure 7 



Genotype, by designation, Planispirina communis Seguenza 

 Planisjnrina Seguenza, Atti R. Accad. Lincei, ser. 3, vol. 6, 1880, p. 310. 



Test in the early stages like Cornuspira, later divided into 

 chambers, several to a coil; aperture simple, without a tooth. 

 Cretaceous to Recent. 



Genus RENULINA Lamarck, 1804 

 Plate 20, figure 11; plate 21, figure 8 



Genoholotype, Renulina opercularia Lamarck 



Renulina Lamarck, Ann. Mus., vol. 5, 1804, p. 354. 



Test in the early stages planispiral, in the adult chambers 

 becoming relatively shorter and broader, one side of the test 

 nearly a straight line, the opposite end extending back to the 

 earlier coils, in final stages of complete specimens the chambers 

 extending back to the earlier coils on both ends and becoming 

 annular. 



Eocene. 



EXPLANATION OF PLATE 21 

 Ophthalmidiidae, Fischerinidae 



Fig. 



1. Cornuspira involvens Reuss. a, side view; b, section. 



2. Vidalina hispanica Schlumberger. (Adapted from Schlumberger). 



3. Nodobacularia tibia (Parker and Jones). (After Rhumbler). 



4. Ophthalmidium inconstdns H. B. Brady. 



5. Spiropthalmidium actitimargo (H. B. Brady). (After H. B. Brady). 



6. Discospirinia tenuissima (Carpenter). (Adapted from H. B. Brady). 



7. Planispirina exigua H. B. Brady. (Adapted from H. B. Brady). 



8. Renulina opermdaria Lamarck. 



9. Vertebralina striata d'Orbigny. (After Williamson). 



10. Nubecularia lucifuga Defrance. (After H. B. Brady). 



11. Calcituba polymorpha Roboz. (After Roboz). 



12. Squamulina laevis Schultze. (Adapted from Schultze). 



13. Fischerina helix Heron-Allen and Earland. (Adapted from Heron- 



Allen and Earland). a, dorsal view; b, ventral view; c, side view. 



