As he does so he exhales the air from his lungs through blow-holes or spiracles at the top of his head; and this warm, moist air, coming thus from his lungs into the cool air, condenses, forming a jet of vapor looking like a fountain, though there is, in fact, no spout of water.
"American Merchant Ships and Sailors"
Willis J. Abbot
When I entered, I found to my surprise that there was plenty of light, which was supplied from windows, composed of small panes of whalebone ground down very thin, and at the further end the head and scull of the animal formed a kitchen, the smoke from the fire escaping through the spiracles or breathing-holes above.
"The Pacha of Many Tales"
Captain Frederick Marryat
Doubtless the skin pores of these men have taken on the character of spiracles.
"Police!!!"
Robert W. Chambers