A third subfamily, Discopylida, is formed by the building of a chambered equatorial girdle around the margin of Pylodiscus.
Pores in the phacoid shell regular, circular, five on its radius; in the chambered spongy girdle much smaller and irregular.
Margin of the disk armed with numerous bristle-shaped radial spines, as long as the breadth of the chambered girdle.
Disk elliptical (6 : 7), with four chambered rings around the elliptical central chamber, of equal breadth.
In the centre of this chambered cortical shell lies constantly a trizonal or Larnacilla-shaped medullary shell.
The Margin of the chambered disk exhibits many differences, which afford characters for the distinction of genera.
This arm is chambered for the Colt .41 caliber short and long cartridges.
Never use other ammunition in your arm than that for which it is chambered.
Drawing my revolver, which was a six chambered one, I held it up.
Whittier thought that the “Chambered Nautilus” was “booked for immortality.”