106 FORAMINIFERA 



Subfamily 1. Haplophragmiinae 

 Test composed of simple chambers, not labyrinthic 



Genus TROCHAMMINOIDES Cushman, 1910 



Plate 10, figures 1-3 

 Genoholotype, TrochamTnina proteus Karrer 



Troehamminoides Cushman, Bull. 71, U. S. Nat. Mus., pt. 1, 1910, p. 97. 



Trochammiva (part) of authors. 



Ammodiscus (part) Rhumbler, Arch. Prot., vol. 3, 1903, p. 281. 



Test of several coils, not involute, divided more or less irreg- 

 ularly into chambers with the openings between them large; 

 wall of fine sand with yellowish-brown cement ; aperture simple 

 at the end of the last-formed chamber. 



Carboniferous to Recent. The recent species is widely dis- 

 tributed but never seems to be common. 



Genus HAPLOPHRAGMOIDES Cushman, 1910 



Plate 10, figures 4, 5 

 Genotype, by designation, Nonionina canariensis d'Orbigny 



Haplophragmoides CusHMAN, Bull. 71, U. S. Nat. Mus., pt. 1, 1910, p. 99. 

 Nonionina (part) d'Orbigny, in Barkbr-Webb and Bertheeot, Hist. Nat. 



lies Canaries, vol. 2, pt. 2, Foraminiferes, 1839, p. 128. 

 Placopsilina (part) Parker and Jones, Ann. Mag. Nat. Hist., ser. 2, vol. 



19, 1857, p. 301. 

 Lituola (part) of authors. 

 Haplophragniiu'm (part) of authors. 

 Trochammina (part) of authors. 

 Ammo chilo stoma (part) Eimeu and Fickert, Zeitschr. Wiss. Zool., vol. 



65, 1899, p. 692. 



Test of several coils, planispiral, usually not completely in- 

 volute, chambers simple; wall single, arenaceous or with sponge 

 spicules, firmly cemented, amount of cement varying greatly 

 in different species; aperture simple, at the base of the aper- 

 tural face of the chamber or in the face of the chamber. 



Carboniferous to Recent. Recent species adapted to habitat 

 and geographical areas, some species of deep cold waters, others 

 abundant in shallow warmer waters. 



