348 PIK)T(JZ()OJ.OGY 



Genus Hyperammina Brady (Fig. 158, d) 



Test with the second chamber usually coiled at least in young 

 Test of arenaceous material with much cement, usually yellow- 

 ish or reddish brown; fossil and recent 



Family 5 Ammodiscidae 



Genus Ammodiscus Reuss (Fig. 158, e) 



Test of siliceous material, second chamber partially divided; 

 fossils only Family 6 Silicinidae 



Genus Silicina Bornemann (Fig. 158, /) 



Test typically many-chambered 



Test with all chambers in a rectilinear series; fossil and recent. . 

 Family 7 Reophacidae 



Genus Reophax Montfort (Fig. 158, g) 



Test planispirally coiled at least in young 



Axis of coil, short; many uncoiled forms; fossil and recent. . . . 

 Family 8 Lituolidae 



Genus Lituola Lamarck (Fig. 159, a) 



Axis of coil usually long, all close-coiled 



Interior not labyrinthic; fossil only. . . .Family 9 Fusulinidae 



Genus Fusulina Fisher (Fig. 159, h) 

 Interior labyrinthic; fossil only Family 10 Loftusiidae 



Genus Loftusia Brady 



Test typically biserial at least in young of microspheric form; 

 fossil and recent Family 11 Textulariidae 



Genus Textularia Def ranee (Fig. 159, c) 



Test typically triserial at least in young of microspheric form 

 Aperture usually without a tooth, test becoming simpler in 

 higher forms; fossil and recent. .Family 12 Verneuilinidae 



Genus Verneuilina d'Orbigny (Fig. 159, d) 



Aperture typically with a tooth, test becoming conical in higher 

 forms; fossil and recent Family 13 Valvulinidae 



Genus Valvulina d'Orbigny (Fig. 159, e) 



Test with whole body labyrinthic, large, flattened, or cylindrical; 

 recent Family 14 Neusinidae 



