148 FORAMINIFERA 



Test with the coiling in five planes, the chambers a half coil 

 in length and added successively in planes 144° apart, five cham- 

 bers completing a cycle, each chamber 72^ from its adjacent one, 

 but 144'' from the immediately preceding one; wslW imperforate, 

 calcareous, often with arenaceous material on the exterior and in 

 deep or brackish water occasionally becoming siliceous ; aperture 

 usually with a simple tooth. 



Carboniferous (?) to Recent. 



Genus MILIOLA Lamarck, 1804 



Plate 17, figure 5; plate 19, figure 3 

 Genotype, by designation, Miliola saxorum Lamarck 



Miliola (part) Lamarck, Ann. Mus., vol. 5, 1804, p. 349. 

 Quinqueloculina (part) d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 301. 

 Pentellina Munier-Chalmas and Schlumberger, Bull. Soc. Geol. France, 



ser. 4, vol. 5, 1905, p. 116 (genotype, by designation, P. heberti 



Schlumberger). 



Test in its structure similar to Quinqueloculina but the aper- 

 ture cribrate. 

 Eocene. 



Genus SCHLUMBERGERINA Munier-Chalmas, 1882 



Plate 53, figures 8-10 



Genoholotype, Schlumbergerina areniphora Munier-Chalmas 

 Schlumbergerina Munier-Chalmas, Bull. Soc. Geol. France, ser. 3, vol. 



10, 1882, p. 424. 

 Miliolina (part) of authors. 

 Massilma (part) of authors. 



Test typically quinqueloculine, the chambers narrowing so that 

 frequently more than five chambers may be visible from the ex- 

 terior; wall calcareous, imperforate, the exterior thickly coated 

 with sand grains; aperture cribrate. 



Late Tertiary and Recent. 



The young of some of the species with arenaceous exterior 

 frequently assigned to Massilina are close to this. The Miliolina 

 alveoliniformis H. B. Brady described in 1879 is probably the 

 same as Munier-Chalmas' species and belongs here. This species 

 is often abundant in shallow water tropical collections. 



