FAMILY 19. TROCHAMMINIDAE 171 



III. Test with the adult chambers more or less involute. 



A. Test coarsely arenaceous. 



1. Aperture at the umbilical border Ammosphaeroidina. 



2. Aperture terminal; test elongate Nouria. 



B. Test finely arenaceous with much cement; aperture at the base or 



in the face of the last-formed chamber Aynmochilostoma. 



Subfamily 1. Trochammininae 

 Test trochoid, chambers in spiral whorls ; aperture ventral. 



Genus TROCHAMMINA Parker and Jones, 1860 

 Plate 22, figure 1 



Genotype, by designation, Nautilus inflatus Montagu 



Trochammina Parker and Jones, Quart. Journ. Geol. Soc, vol. 16, 1860, 



p. 304. 

 Nautilus (part) Montagu (not Linne), Test. Brit., Suppl., 1808, p. 81. 

 Rotalina (part) Williamson (not d'Orbigny), Rec. Foram. Great 



Britain, 1858, p. 56. 

 Lituola (part) Parker and Jones (not Lamarck), Philos. Trans., vol. 



155, 1865, p. 407. 

 Haplophragiftiium (part) Siddall (not Reuss), Cat. British Rec. Foram., 



1879, p. 4. 

 Amino glohigerina EiMER and Fickert, Zeitschr. Wiss. Zool., vol. 65, 1899, 



p. 704 (genoholotype, Haplophragmium globigeriniforme Parker and 



Jones). 

 Tritaxis Schubert, Pal. Zeitschr., vol. 3, 1920, p. 180 (genotype, by 



designation, Rotalina fiisca Williamson). 



Test free or adherent, spiral, trochoid, all chambers visible 

 from the dorsal side, only those of the last-formed coil from the 

 ventral; wall arenaceous; aperture, an arched slit on the inner 

 margin of the ventral side of the chamber. 



Carboniferous to Recent. 



Genus GLOBIVALVULINA Schubert, 1920 

 Plate 53, figures 3, 4 



Genoholotype, Valvulina bulloides H. B. Brady 



Globivalvulina Schubert, Pal. Zeitschr., vol. 3, 1920, p. 153. 

 Valvuli7ia (part) H. B. Brady (not d'Orbigny), Pal. Soc. Mon. 30, 1876, 

 p. 89. 



