Calcituba, a porcellanous type, which after forming the embryonic chamber with its deflected pylome grows into branching stems, may fall apart into sections, or the protoplasm may escape and break up into small amoebulae.
The porcellanous genera, however, form a compact group, the replacement of the shell by silica in forms dwelling in the red clay of the ocean abysses, where calcium carbonate is soluble, not really making any difficulty.
Shells porcellanous imperforate, almost invariably with a camptostyle leading from the embryonic chamber; Cornuspira (Schultze) (fig.
Cycloclypeus, among the Nummulite group, with a very finely perforate wall, recall the porcellanous Orbiculina and Orbitolites.
In most groups the stylopyle is straight; but in the majority of the porcellanous shells it is bent down on the side of the shell, and constitutes the "flexopyle" of A.
They have acquired a milky, porcellanous surface while lying in the earth.
Hawkins, of the Geological Survey, in 1872 came across a smaller and thicker porcellanous ovate implement lying on the surface of the ground.
The flint of which it is made has become nearly white and porcellanous on both faces, though more so on one than on the other.
The flint is white and porcellanous on the surface, and has become so light and soft in structure, that it can readily be cut with a knife.
Circoporida# with spherical shell of a peculiar dimpled, porcellanous structure, and with a variable number of simple radial main-spines which are usually not regularly arranged.
The structure of the thick porcellanous shell and the radial spines is different from the other Circoporida.
The structure of the shell in the Circoporida is the same as in the Tuscarorida, of a peculiar porcellanous nature.
Numerous simple thin needles of silica lie tangentially disposed and irregularly scattered in the porcellanous or cement-like substance of the thick shell-wall.
A very remarkable structure, differing from that in all other Radiolaria, is found in the porcellanous shell of the Circoporida (Pl.
The elementary structure of the opaqueporcellanous shells, which distinguish the two families Circoporida (Pls.
John Turner, of Lane End, made jasper from a different formula to Wedgwood, being more porcellanous in character.
His vases have marbled decorations, and he was fully aware of the use of pounded flint, which gave his ware a porcellanous character, "a discovery which was not apparently known to the Staffordshire potters until about 1720.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "porcellanous" in a variety of sentences. We hope that you will now be able to make sentences using this word.
