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- W3091984317 abstract "By subjecting small portions of calcareous rock to the action of diluted hydrochloric acid, the calcareous earth and the shells it had enveloped were removed; the residue consisting of particles of quartz and of green silicate of iron; and also numerous remains of the soft parts of animalcules, chiefly Xanthidia and Rotaliæ. The organization of the latter appears, from the observations of Ehrenberg, to be very simple, and to have no relation with the Cephalopoda, as was formerly imagined. The body is enclosed within the shell, which is polythalamous, and it occupies not only the outer chamber, but also all the cells contemporaneously, and the shell is pierced all over with minute pores, through which tentacula protrude; and there are also several soft transparent feelers, or pseudopodia which are instruments of locomotion. When the shell is removed by acid, the soft body is exposed, and is seen to extend to the innermost chamber; and there is a connecting tube occupying the place of the siphuncle of the nautilus, but which is the intestinal canal; for the cells are the receptacles of the digestive sacs or stomachs, in which monads, naviculæ, and other minute infusoria, which the animal had swallowed, may sometimes be observed. In the fossil remains, the appearance of the parts which the author supposes to be the digestive organs, is that of a series of bladders or sacs, composed of a tough flexible integument, and connected by a tube. These organs are more or less filled with a dark substance; those which are distended are always well-defined, while the empty ones are collapsed and disposed in folds, just as membranous pouches would appear under similar conditions. The sacs regularly diminish in size from the outer to the innermost cell, and vary in number from fourteen to twenty-six. In some instances, small papillae are observable on the external surface of the integument, which are probably vestiges of the bases of the pseudopodia or tentacula." @default.
- W3091984317 created "2020-10-15" @default.
- W3091984317 date "1851-12-31" @default.
- W3091984317 modified "2023-09-25" @default.
- W3091984317 title "On the fossil remains of the soft parts of foraminifera discovered in the chalk and flint of the South-east of England" @default.
- W3091984317 doi "https://doi.org/10.1098/rspl.1843.0096" @default.
- W3091984317 hasPublicationYear "1851" @default.
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