pneumaticus

Two distinct organs sometimes perform simultaneously the same function in the same individual; to give one instance, there are fish with gills or branchiae that breathe the air dissolved in the water, at the same time that they breathe free air in their swimbladders, this latter organ having a ductus pneumaticus for its supply, and being divided by highly vascular partitions.

On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life 1859

Two distinct organs sometimes perform simultaneously the same function in the same individual; to give one instance, there are fish with gills or branchiae that breathe the air dissolved in the water, at the same time that they breathe free air in their swimbladders, this latter organ having a ductus pneumaticus for its supply, and being divided by highly vascular partitions.

On the Origin of Species~ Chapter 06 (historical) Charles Darwin 1859

Two distinct organs sometimes perform simultaneously the same function in the same individual; to give one instance, there are fish with gills or branchiae that breathe the air dissolved in the water, at the same time that they breathe free air in their swimbladders, this latter organ having a ductus pneumaticus for its supply, and being divided by highly vascular partitions.

On the origin of species Charles Darwin 1845

Two distinct organs sometimes perform simultaneously the same function in the same individual; to give one instance, there are fish with gills or branchiæ that breathe the air dissolved in the water, at the same time that they breathe free air in their swimbladders, this latter organ having a ductus pneumaticus for its supply, and being divided by highly vascular partitions.

On the Origin of Species by Means of Natural Selection or the Preservation of Favoured Races in the Struggle for Life. (2nd edition) Charles Darwin 1845

(French pneumatique, from Latin pneumaticus, from Greek pneumatikos, from pneuma, pneumat -, wind; see pneu - in Indo-European roots.) pneu·mat'i·cal·ly adv., pneu'ma·tic'i·ty (nōō'mə-tĭs'ĭ-tē, nyōō '-) n.

Everything2 New Writeups lalalulumiles 2009

(French pneumatique, from Latin pneumaticus, from Greek pneumatikos, from pneuma, pneumat -, wind; see pneu - in Indo-European roots.) pneu·mat'i·cal·ly adv., pneu'ma·tic'i·ty (nōō'mə-tĭs'ĭ-tē, nyōō '-) n.

Everything2 New Writeups lalalulumiles 2009

Again, two distinct organs, or the same organ under two very different forms, may simultaneously perform in the same individual the same function, and this is an extremely important means of transition: to give one instance, —there are fish with gills or branchiæ that breathe the air dissolved in the water, at the same time that they breathe free air in their swim bladders, this latter organ being divided by highly vascular partitions and having a ductus pneumaticus for the supply of air.

VI. Difficulties of the Theory. Modes of Transition 1909