. Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote. 184 J'BOTOZOA. Order 1.—FORAMINIFERA.* Rhizopoda, either naked or with a shell, the shell almost invariably calcareous and usually pierced with fine pores for the exit of the pseudopodia. Only in rare cases, for instance Nonionina and Polymorphina, is the shell substance of a silicious nature; in all other forms it is. Fio. 123.— ttnera, with network of pseudopodia (after IT. Schultzc). membranous or consists of a calcareous deposit in a basis of organic matter. The shell is either a simple
. Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote. 184 J'BOTOZOA. Order 1.—FORAMINIFERA.* Rhizopoda, either naked or with a shell, the shell almost invariably calcareous and usually pierced with fine pores for the exit of the pseudopodia. Only in rare cases, for instance Nonionina and Polymorphina, is the shell substance of a silicious nature; in all other forms it is. Fio. 123.— ttnera, with network of pseudopodia (after IT. Schultzc). membranous or consists of a calcareous deposit in a basis of organic matter. The shell is either a simple chamber, usually provided with a large opening, or is many chambered, that is, is composed of numerous chambers arranged upon one another according to definite laws. The spaces of these chambers communicate by means of narrow * Besides D'Orbigny, Max Schultze, 1. c., compare W. C. Williamson, " On the recent Foraminifera of Great Britain," London, 1858. Carpenter. "Intridur- tion to the Study of the Foraminifera," London. 18G2. Rvuss, "Eutwurf eiuer system. Zusammeustellung der Foraminiferen," Wien, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Claus, Carl, 1835-1899; Sedgwick, Adam, 1854-1913; Sinclair, F. G. (Frederick Granville), b. 1858. London, Swan Sonnenschein & co.
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