RHIZOPODA. 1 3 



Fam. 2. Euglyphina. Shell chitinous or silicious, composed of hexagonal or 

 roundish plates ; pseudopodia pointed, branched. Fresh water. Euglypha Duj. 

 (Fig. 7), Trinema Duj. 



Fam. 3. Gromidae. Test chitinous, smooth or incrusted with foreign bodies, 

 imperforate, with a pseudopodial aperture at one or both extremitie^ pseudo- 

 podia long, branching, reticulated. Fresh water and marine. GromiaDuj., 

 Lieberkiihnia C. and L., Mikrogromia R. Hertwig, Diaphoropodon Archer, 

 Shepherdella Siddal. 



Fam. 4. Miliolidae. Test imperforate, mono- or polythalamic ; normally 

 calcareous and porcellaneous, sometimes incrusted with sand ; under starved 

 conditions (e.g. in brackish water) becoming chitinous or chitino-arenaceous ; 

 at abyssal depths occasionally consisting of a thin homogeneous, imperforate 

 silicious film. Marine. Squamulina Schultze, Nubecularia Defrance, Bilo- 

 culina d'Orb. , Fabularia Defrance, Spiroloculina d'Orb., Miliolina Williamson, 

 Hauerina d'Orb., Vertebraliiia d'Orb., Orbiculina Lamarck, OrUtolites Lamarck. 

 Fam. 5.- Astrorhizidae. Test invariably composite, usually of large size and 

 monothalamic ; often branched or radiate, sometimes segmented by constriction 

 of the walls, but seldom or never truly septate ; polythalamic forms never 

 symmetrical. 



Sub-fam. 1. Astrorhizince. Walls thick, composed of loose sand or mud 

 very slightly cemented. Astrorhiza Sandahl, Pdostiia Brady, Syringammina 

 Brady. 



Sub-fam. 2. Piluliiice. Test monothalamic ; walls thick, composed chiefly 

 of felted sponge-spicules and fine sand, without calcareous or other cement. 

 Pilulina Carpenter. 



Sub-fam. 3. Saccamminince. Chambers nearly spherical; walls thin, 

 composed of firmly cemented sand grains. Saccammina M. Sars, Psam- 

 mosphcera Sch., Sorosphcera Brady. 



Sub-fam. 4. Rhabdammininaz. Test composed of firmly cemented sand 

 grains, often with sponge-spicules intermixed ; tubular, straight, radiate, 

 branched, or irregular ; free or adherent ; with one or more apertures ; 

 rarely segmented. Rhabdammina M. Sars, Rhizammina Brady, Sagenella 

 Brady, Botellina, Carp., Haliphysema Bowerbank. 



Fam. 6. Lituolidae. Test arenaceous, usually regular in contour ; septation 

 of the polythalamic forms often imperfect, chambers frequently labyrinthic. 

 Comprises sandy isomorphs of the simple porcellaneous and hyaline types 

 (Cornuspira, Miliolina, Lagena, GloUgerina, Rotalia, etc.), together with some 

 adherent species. Lituola Lamarck, Thurammina Brady, Ammodiscus Reuss, 

 Trochammina Parker and Jones, WebUna d'Orb., Cijclammina Brady. 



Fam. 7. Textularidae. Test of the larger species arenaceous, either with or 

 without a perforate calcareous basis ; smaller forms hyaline and conspicuously 

 perforated. Chambers arranged in two or more alternating series, or spiral, 

 or confused; often dimorphous. Textularia Defrance, Cnneolina d'Orb., 

 Verneuilina d'Orb., Tritaxia Reuss, Pavonina d'Orb., Valvulina d'Orb., 

 Clavulina d'Orb., Bulimina, d'Orb., Virgulina d'Orb;, Bolimna d'Orb., 

 Pleurostomella Reuss. 



Fam. 8. Chilostomellidse. Test calcareous, finely perforate, polythalamous. 

 Segments following each other from the same end of the long axis, or alternately 

 at the two ends, or in cycles of three ; more or less embracing. Aperture, a 

 curved slit at the end or margin of the final segment. Ellipsoidina Seguenza, 

 Chilostomella Reuss, Allomorphina Reuss. 



