FOEAMINIFERA OF THE ATLANTIC OCEAN 17 



Subfamily 4. Allomorphinellinae 



Test with the later chambers planispiral, involute, chambers increas- 

 ing rapidly in size as added; apertures becoming median. 



Genus PULLENIA Parker and Jones, 1862 



Bull. 104, pt. 5, pp. 40-42 (not P. oUiquiloculata = Pulleniatina) . 



Family 39. GLOBIGERINIDAE 



Test, at least in the early stages, trochoid, umbilicate; wall calcare- 

 ous, rather coarsely perforate, usually with a cancellated surface, in 

 well preserved specimens of the simpler genera with fine spines; aper- 

 ture typically large but in the higher genera consisting of numerous 

 small openings variously placed. 



Subfamily 1. Globigerininae 



Wall clothed with fine spines, typically trochoid but in some genera 

 becoming planispiral; wall often cancellated, coarsely perforate. 



Genus GLOBIGERINA d'Orbigny, 1826 



Bull. 104, pt. 5, pp. 6-28 (except G. rubra, G. conglohata, G. 

 sacculifera = Glohigerinoides ; G. aequilateralis = Globigerinella and G. 

 linneiana = Glohotruncana) . 



Genus GLOBIGERINOIDES Cushman, 1927 



Bull. 104, pt. 5, pp. 15-21 {Glohigerina rubra d'Orbigny, G. conglo- 

 hata H. B. Brady, and G. sacculifera H. B. Brady). 



Genus GLOBIGERINELLA Cushman, 1927 



Bull. 104, pt. 5, p. 25 (Globigerina aequilateralis H. B. Brady). 



Genus HASTIGERINA Wyville Thomson, 1876 



Bull. 104, pt. 5, p. 33. 



Subfamily 2. Orbulininae 



Test in the early stages trochoid like Globigerina, later developing 

 a globular chamber entirely enclosing the earlier ones which may be 

 later resorbed ; wall often of several layers with perforations of various 

 sizes, occasionally large openings, which are apparently accidental; 

 exterior with fine spines. 



Genus ORBULINA d'Orbigny, 1826 

 Bull. 104, pt. 5, pp. 28-32. 



