"Was your husband a swimmer?" he asked cautiously.
He loved riding and walking, was an expert swimmer and enjoyed a game at tennis.
With regard to its habits, all that need be said here is that while Amphioxus is an expert swimmer when occasion requires, yet it spends most of its time burrowing in the sand, in which, when at rest, it lies buried with head protruding and mouth wide agape.
It must tread with its wings and rise upon the air as a swimmer upon the water, or as a kite upon the wind.
The technical name, Notonecta, meaning "back-swimmer," alludes to the habit of the insect of swimming upside down, the body being propelled through the water by powerful strokes of the hind legs, which are fringed with hair and, when at rest, are extended laterally like a pair of sculls in a boat.