4. Miliolidaceae: test porcellanous, imperforate, spirally coiled or cyclic, often chambered except in _Cornuspira_: simple in _Squamulina_. _Cornuspira_, Max Sch.; _Peneroplis_, Montf.; _Miliolina_, Lam. (incl. _Biloculina_ (Fig. 15), _Triloculina_, _Quinqueloculina_ (Figs. 14, 4; 15, B), _Spiroloculina_ (Fig. 13, 5) of d'Orb.); _Alveolina_, d'Orb.; _Hauerina_, d'Orb.; _Calcituba_, Roboz; _Orbitolites_, Lam.; _Orbiculina_, Lam.; _Alveolina_, Park. and Jeffr.; _Nubecularia_, Def.; Squamulina, Max Sch. (Fig. 14, 3). 5. Textulariaceae: test calcareous, hyaline, perforated; chambers increasing in size in two alternating rows, or three, or passing into a spiral. _Textularia_, Def.; _Bulimina_, d'Orb.; _Cassidulina_, d'Orb. 6. Cheilostomellaceae: test vitreous, delicate, finely perforated, chambered, isomorphic with the spiral forms of the Miliolidaceae. _Cheilostomella_, Reuss. 7. Lagenaceae: Test vitreous, very finely perforate, chambers with a distinct pylome projecting (ectosolenial), or turned in (entosolenial), often succeeding to form a necklace-like shell. _Lagena_, Walker and Boys (Fig. 13, 2); _Nodosaria_, Lam. (Fig. 13, 3); _Cristellaria_, Lam.; _Frondicularia_, Def. (Fig. 13, 4); _Polymorphina_, Lam.; _Ramulina_, Wright. 8. Globigerinidae: test vitreous, perforate; chambers few, dilated, and arranged in a flat or conical spiral, usually with a crescentic pylome to the last. _Globigerina_, d'Orb. (Figs. 13, 6; 16, 2); _Hastigerina_, Wyv. Thoms.; _Orbulina_, d'Orb. (Fig. 16, 1). 9. Rotaliaceae; test vitreous, perforate, usually a conical spiral (like a snail), chambers often subdivided into chamberlets, and with a proper wall, and intermediate skeleton traversed by canals. _Rotalia_, Lam. (Fig. 14, 2); _Planorbulina_, d'Orb. (Fig. 13, 9); _Polytrema_, Risso; _Spirillina_, Ehr. (non-septate); _Patellina_, Will.; _Discorbina_, P. and J. (Fig. 13, 7). 10. Nummulitaceae: test usually a complex spiral, the turns completely investing their predecessors: wall finely tubular, often with a proper wall and intermediate skeleton. _Fusulina_, Fisch.; _Polystomella_, Lam.; _Nummulites_, d'Orb. (Fig. 13, 11); _Orbitoides_, d'Orb.