324 FORAMINIFERA 



Genus WEBBINA d'Orbigny, 1839 



Plate 50, figure 8; plate 51, figure 7 

 Genoholotype, Webbinu rugosa d'Orbigny 

 Webbina d'Orbigny, in Baker, Webb and Berthelot, Hist. Nat. lies 



Canaries, 1839, vol. 2. pt. 2, "Foraminiferes", p. 125. 

 Webbum Rhumbler, Foram. Plankton Exped., pt. 2, 1913, p. 445 (geno- 

 type, by designation, Webbina rur/nsa d'Orbigny). 



Test attached, consisting of a few chambers with a neck and 

 circular aperture with a slight lip, the wall calcareous and per- 

 forate. 



Tertiary and Recent. 



The genus Placopsum Rhumbler, 1913, may belong close to 

 Webbina, but until the types may be restudied to determine more 

 of the structure, it may be simply noted here. Rhumbler places 

 these Jurassic forms close to Webbina. The genotype is desig- 



EXPLANATION OF PLATE 53 



Fig. 



1, 2. Ruditaxis riidis (H. B. Brady). X 35. (After type figures). 

 Fig. 1, a, dorsal view; b, ventral view; c, peripheral view. Fig. 

 2, Section showing labyrinthic interior. 



3, 4. Globivalvulina bulloides (H. B. Brady). (After type figures). 

 Fig. 3, a, dorsal view; b, ventral view; c, peripheral view. X 35. 

 Fig. 4, Section. X 65. 



5-7. Hemigordius schlumbergeri (Howchin). (After type figures). 

 Fig. 5, Exterior. Fig. 6, Transverse section. Fig. 7, Longi- 

 tudinal section. 

 8. Schlitmbergerma areniphora Munier-Chalmas. (After type figure). 

 9, 10. Schlumbergcrina alveolinifortnis (H. B. Brady). X 15. (After 



H. B. Brady). Fig. 9, Side view. Fig. 10, Apertural view. 

 11-13. Silvestria bradyi (Millett). X 35. (After type figures). Ex- 

 teriors. 



14. Flintia robasta (H. B. Brady). X 13. (After type figure), a, 



side view; b, apertural view. 



15. PatcUinclla inconsplcua (H. B. Brady). X 50. (After type 



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

 16, 17. Cornuspirella diffusa (Heron-Allen and Earland). X 13. (After 

 type figures). Fig. 16, Showing central coiled portion and 

 some of the peripheral extensions. Fig. 17, A more expanded 

 peripheral portion. 

 18. Planopulvinulina dis-pansa (H. B. Brady). X 10. (After type 

 figure), a, dorsal view; b, ventral view, 



