FAMILY IG. MILIOLIDAE 149 



Genus MASSILINA Schlumberger, 1893 



Plate 17, figures 6, 7; plate 19, figure 9 



Genotype, by designation, Quinqueloculina secans d'Orbigny 



Massilina Schlumberger, Mem. Soc. Zool. France, 1893, p. 218. 

 Quinqueloculina (part) d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 303. 

 Miliolina (part) of authors. 



Test with the early chambers quinqueloculine, later ones 

 added on opposite sides in a single plane, the quinqueloculine 

 stage present in both megalospheric and microspheric forms; 

 aperture simple, with a bifid tooth. 



Cretaceous to Recent (probably older). 



Genus SPIROLOCULINA d'Orbigny, 1826 



Plate 17, figures 8-10; plate 19, figure 10 

 Genotype, by designation, Spiroloculina depressa d'Orbigny 



Spiroloculina d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 298. 

 Miliola (part) Lamarck, Ann. Mus., vol. 5, 1805, p. 352, (and later 

 authors). 



Test with the early chambers in the microspheric form quin- 

 queloculine, later ones in a single plane, chambers a half coil in 

 length; apertural end usually with a neck and lip, simple, with 

 a simple or bifid tooth. 



Permian (?) to Recent. 



Genus NUMMOLOCULINA Steinmann, 1881 

 Plate 17, figures 11-13; plate 19, figure 4 



Genoholotype, Bilocidina contraria d'Orbigny 



Nmnmoloculi7ia Steinmann, Neues Jahrb., 1881, p. 31. 



Biloculina (part) d'Orbigny, Foram. Foss. Bass. Tert. Vienne, 1846, 



p. 266. 

 Planispirina (part) H. B. Brady (not Seguenza), Rep. Voy. Challenger, 



Zoology, vol. 9, 1884, p. 195. 



Test with the earliest chambers quinqueloculine, later ones in 

 a single plane, several making up a coil ; aperture rounded with 

 a flat semicircular tooth. 



Jurassic to Recent. 



