INTRODUCTION. 
XI 
Group Y. Test calcareous, finely perforate. 
Fam. YII. CMlostomellidae. 
Chilostomella, Reuss ; Allomorphina, Reuss ; Ellipsoidina, Seguenza. 
Earn. YIII. Lagenidae. 
a. Lagexxna. — Lagena, Walker and Jacob; Ramulina, Jones; Nodosaria, 
Lamarck (Glandulina, d’Orb. ; Dentalina, d’Orb.; Lingulina , d’Orb.) ; Frondi- 
cularia, Defr. ; Vciginulina, d’Orb. ( Rimulina , d'Orb. ; Rhabdogonium, Reuss) ; 
Marginulina, d’Orb. ; Cristellaria, Lam. ( Planularia , Defr.) ; Flabellina , d’Orb. 
b. Polymorphinlna. — Polymorphina, d’Orb. ( Dimorphinci , d’Orb.) ; XJvige- 
rina, d’Orb. ( Sagrina , d’Orb.). 
Group YI. Test calcareous, generally with coarse perforations ; without 
canal-system. 
Ram. IX. GlobigerinidaB. 
Globigerina , d’Orb. ( Orbulina , d’Orb.); Pullenia , Parker and Jones; SpJue- 
roidina, d’Orb. ; Candeina , d’Orb. 
Group YII. Test calcareous, coarsely perforate ; some with double 
chamber-walls and interseptal canals. 
Fam. X. Rotalidae. 
Spirillina, Ehrenb. ; Patellina, Williamson; Discorbina, P. &J. ; Planorbu- 
lina, d’Orb. (Truncatidina, d’Orb. ; Anomalina, d’Orb.) ; Rupertia, Wallich ; 
Carpent&'ia, Gray; Polytrema, Risso ; Tinoporus, Carpenter ( Gypsina , Carter) ; 
Cymbalopora, von Hagenow ; Pulvinulina, P. & J. ; Rotalia, Lamarck ; Calca- 
rina, d’Orb. 
Group YIII. Test calcareous, very finely tubulated ; all the higher 
forms with a system of interseptal canals. 
Fam. XT. Nummulinidae. 
a. Polystomellina. — Nonionina , d’Orb. ; Polystomella , Lam. 
b. Nummulitina. — Archcediscus, Brady ; Amphistegina, d’Orb. ; Fusulina , 
Fischer ; Fozoon, Dawson ; Cycloclypeus, Carpenter ; Heterostegina, d’Orb. ; 
Operculina, d’Orb. ; Nummulites, Lamarck ( Assilina , d’Orb.). 
