The foraminifera: an introduction to the study of the protozoa . niforfnis, Siddall, Quart. Sci., , vol. xx. 1880, p. 131, pi. , marine, in shore pools, on marine algse.(Plate 1, fig. E.) Ainpliitrema, Aechee. Test more or less covered by foreign arenaceousparticles ; apertures at opposite ends of the test andprovided wdth a rimlike neck, giving of! two tufts ofelongate, linear, branched, pellucid pseudopodia. Example.—A. Wrightiaimm, Archer, Micr. Sci., , vol. x. 1870, p. 122, pi. 4, 5. Habitat, fresh water, in boggy places,Ireland. Length o
The foraminifera: an introduction to the study of the protozoa . niforfnis, Siddall, Quart. Sci., , vol. xx. 1880, p. 131, pi. , marine, in shore pools, on marine algse.(Plate 1, fig. E.) Ainpliitrema, Aechee. Test more or less covered by foreign arenaceousparticles ; apertures at opposite ends of the test andprovided wdth a rimlike neck, giving of! two tufts ofelongate, linear, branched, pellucid pseudopodia. Example.—A. Wrightiaimm, Archer, Micr. Sci., , vol. x. 1870, p. 122, pi. 4, 5. Habitat, fresh water, in boggy places,Ireland. Length of test about 05 mm. (Plate 1,fig. E.) Genera sometimes referred to the :Protogenes (by Claus) ; Lagjjnis (by Carpenter). 72 THE FOEAMINIFERA EXPLANATION OF PLATE 1. Fig. A. hieherlxueluiia Wageneri, Clap, and Lacliiu. Magnified B. Mihrogromia socialis, Archer sp. x 200. C. Qromia oviformis, Dujardin. x 25. D. Diaplioropodon mohile, Archer, x 100. E. Sheplieardella tceniformis, Siddall. Magnified. F. Ampliitrema Wriglitianum, Archer, x 300. PLATE A H L Family I. GKOMIID^. 75 CHAPTEE YIII THE FAMILY MILIOLID^ This very important division comprises the whole ofthe porcellanous-shelled Foraminifera, and the testsare further distinguished by their imperforate shell-wall (sub-order Ijuperfoi-afa vel PorceUanea, RupertJones). They are divided by H. B. Brady into six sub-families, more or less closel} related to one another. The characteristic features of the foraminiferalshell in the family are as follows :— Test imperforate ; normally calcareous and por-cellaneous, sometimes encrusted with sand ; understarved conditions {ejj. in brackish water) becomingchitinous or chitino-arenaceous ; at abyssal depthsoccasionally consisting of a thin, homogeneous,imperforate, siliceous film (H. B. Brady). The shell wall of the miliolids is in nearly allcases of a smooth texture and usually chalk-white inappearance. In some examples, how^ever, the surfaceis pitted, retic
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