FORAMINIFERA OF THE ATLANTIC OCEAN 7 



Family 8. LITUOLIDAE 



Test free, planispiral at least in the young, later portion in some 

 genera uncoiled, divided into chambers, either simple or labyrinthic; 

 wall arenaceous with varying proportions of cement in different 

 genera and species, usually with a yellowish or reddish brown cement, 

 the last-formed chamber in the adult often white ; aperture simple 

 or compound. 



Subfamily 1. Haplophragmiinae 



Test composed of simple chambers, not labyrinthic. 



Genus TROCHAMMINOIDES Cushman, 1910 



Bull. 104, pt. 2, p. 36. 



Genus HAPLOPHRAGMOIDES Cushman, 1910 



Bull. 104, pt. 2, pp. 37-49. 



Genus CRIBROSTOMOIDES Cushman. 1910 



Bull. 104, pt. 2, p. 51. 



Genus AMMOBACULITES Cushman, 1910 



Bull. 104, pt. 2, pp. 60-67. 



Genus HAPLOPHRAGMIUM Reuss, 1860 

 Bull. 104, pt. 2, pp. 67, 68. 



Subfamily 2. Lituolinae 

 Test composed of labyrinthic chambers. 



Genus CYCLAMMINA H. B. Brady, 1876 

 Bull. 104, pt. 2, pp. 52-57. 



Genus LITUOLA Lamarck, 1804 

 Bull. 104, pt. 2, p. 69. 



Family 9. TEXTULARIIDAE 



Test in the earliest stages, at least in primitive forms, planispiral, 

 later in all but the most accelerated forms developing a biserial stage, 

 final development taking various forms, usually becoming uniserial 

 in the more speciaHzed types; wall arenaceous, with a varying 

 proportion of cement in different genera and species; aperture 

 typically at the inner margin of the last-formed chamber in the 

 biserial forms, becoming terminal and sometimes multiple in 

 the uniserial forms. 



