FORAMINIFERA 203 



Genus Rupertia Wallich (Fig. 78, g) 



Later chambers in masses or branching, highly colored; 



' mostly recent and also fossil Family 43 Homotremidae 



Genus Homotrema Hickson 



Test trochoid in the very young of the microspheric form, cham- 

 bers becoming annular later, with definite equatorial and 



lateral chambers, often with pillars; fossil only 



Family 44 Orbitoididae 



Genus Orbitoides d'Orbigny 



References 



Brady, B. H. 1884 Report on the Foraminifera dredged by 



H. M. S. Challenger, during the years 1873 to 1876. Rep. 



Voy. Challenger Zool., VoL 9. 

 CusHMAN, J. A. 1928 Foraminifera: their classification and 



economic use. Sharon, Mass. 

 I^HUMBLER, L. 1904 Systernatische Zusammenstellung der 



rezenten Reticulosa (Nuda u. Foraminifera). Arch. f. 



Protistenk., Vol. 3. 



