328 FORAMINIFERA 



Genus LINDERINA Schlumberger, 1893 



Plate 51, figure 10; plate 52, figures 1-4 

 Genoholotype, Lhiderina brugesi Schlumberger 

 Linderina Schlumberger, Bull. Soc. Geol. France, ser. 3, vol. 21, 1893, 

 p. 120. 



Test similar to Planorbulinella with annular series of cham- 

 bers, but developing a thick layer of clear shell material over 

 the central portion of the test on the two flattened sides; wall 

 calcareous, coarsely perforate ; apertures in the adult formed by 

 the coarse perforations of the peripheral border. 



Upper Eocene. 



Genus ACERVULINA Schultze, 1854 



Plate 52, figures 6-9 



Genotype, by designation, Acervulina inhaerens Schultze 



Acervulina Schultze, Organ. Polythal., 1854, p. G7. 



Test attached by the dorsal side, at least in the early stages, 



if attached to a small object often entirely covering it and then 



covering its own early chambers, earliest chambers coiled; wall 



EXPLANATION OF PLATE 54 



Fig. 



1-3. Ptychomiliola separans (H. B. Brady). X 12. (After type 

 figures). 6, Specimen showing aperture. 



4. Pleu.ro stomellina harroisi (Berthelin). X 120. (After type figures). 



a, front view; h, side view. 



5. Orhignyva ovata Hagenow. (After type figures), a, apertural 



view; b, side view; c, peripheral view. 

 G. Neobulvmina canadensis Cushman and Wickenden. X 125. 

 (After type figures), a, front view; b, side view; c, apertural 

 view. 

 7,8. Flabellammi7ia alexanderi Cushman. X 35. (After type figures). 



b, apertural view. 



9. Epistomella rimosa (Parker and Jones). X 15. (After type 

 figure), a, dorsal view; b, ventral view; c, peripheral view. 

 10, 11. Neocribrella globigerinoides (Parker and Jones). X 15. (After 



type figures). 10 a, 11, showing apertures. 

 12, 13. Cornuspiroides striolata (H. B. Brady). Fig. 12, (After Heron- 

 Allen and Earland), X 2. Fig. 13, (After type figure), b, 

 peripheral view. X 3. 

 14. Lunncammlna permlana Spandel. X 35. (After type figures). 

 a, b, from opposite sides; c, peripheral view; d, end view. 



