Ill FORAMINIFERA 59 



J)iaphorodo7i, Archer; Alloyromia, Rliuiiibl. ( = Gromm, auctt. ^ nee Diij. 

 (Fig. 14, 1) ; LieberkUhnia, CI. and Lachni. (Fig. 12) ; Microgromia, R. Hertw. 

 (Fig. 11) ; Pamphagus, Bailey. 



2. Astrorliizidaceae : test arenaceous, often large, never truly chambered, 

 or if so, asynimetrical. AstrorMza, Sandahl ; Haliphysrma, Bowerb. ; Huc- 

 cammina, M. Sars (Fig. 13, 1); Loftusia, Brady. 



3. Lituolidaceae : test arenaceous, often symmetrical or regularly spiral, 

 isomorphous with calcareous forms : the chambers when old often "labyrin- 

 thine" by the ingrowth of wall-material. Lituola, Lam. ; licophax, Montf. ; 

 AmmodiscHs, Reuss ; Trochammina, Parker and Jeffreys. 



4. Miliolidaceae : test porcellanous, imi^erforate, spirally coiled or cyclic, 

 often chambered except in Cornusjnra : simj)le in Squamtdina. Gornusinra, 

 Max Sch. ; Peneroplis, Montf.; Miliolina, Lam. {mc\. Biloculina {Y\g. 15), 

 Triloculina, Quinqueloculma (Figs. 14,4; 15, B), SpirolocuUna (Fig. 13,5) 

 of d'Orl).); Ah eolina, d'Orh.; Hauerina, d'Orb. ; Calciiuha, 'Rohoz; Orbitolifes, 

 Lam. ; Orbicidina, Lam. ; Alveolina, Park, and Jeffr. ; Nuhccularia, Def. ; 

 SquavuUina, Max Sch. (Fig. 14, 3). 



5. Textulariaceae : test calcareous, hyaline, jierforated ; 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. Cheilostomellu, Reuss. 



7. Lagenaceae : Test vitreous, very finely perforate, chambers with a 

 distinct pylome projecting (ectoselonial), 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.; Frondicidaria, Def. (Fig. 

 13, 4) ; Polymorphina, Lam. ; Ramulina, Wright. 



8. Globigerinidae : test vitreous, perforate ; chamljers few, dilated, and 

 arranged in a flat or conical spiral, usually with a crescentic pylome to 

 the last. Glohigerina d'Orh (Figs. 13, 6 ; 16, 2) ; Hastigerina, Wyv. Thorns. ; 

 Orhidina, 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 jiroper wall, 

 and intermediate skeleton traversed by canals. Rotalia, Lam. (Fig. 14, 2) ; 

 Plan orhidina, d'Orb. (Fig. 13, 9) ; Polytrema, Risso ; BpirUlina, Ehr. (non- 

 septate) ; Patellina, Will. ; Discorhina, P. and J. (Fig. 13, 7). 



10. Nummulitaceae : test usually a comj^lex sjjiral, the turns completely 

 investing their predecessors : wall finely tubular, often M'ith a proper wall 

 and intermediate skeleton. Fusidina, Fisch. ; Pohjstomella, Lam. ; NnmviuHtcs, 

 d'Orb. (Fig. 13, 11); Orbitoides, d'Orlx 



The Allogromidiaceae are a well-marked and distinct order, on 

 the whole resembling the liliizopoda Filosa, and are often found 

 with them in fresh water, while all other Foraminifera are marine. 

 The type genus, Allogromia (Fig. 14, 1), has an oval chitinous 

 shell. Microgromia socialis (Fig. 11) is often found in aggregates, 

 the pseudopodia of neighbours fusing where they meet into a 



^ Tlie type of Dujardiii's genus Groin ia is G. (>rifi>rnns = lIijnlopHS dujardinii, 

 M. Sch., wliicli is one of the Filosa. 



