Origin of gill slit
Examples from the Web for gill slit
It shifts in position with the position of the gill-slit, but there can be no backwards extension of the cavity.The Origin of Vertebrates|Walter Holbrook Gaskell
Between these two arches he found an opening, just as between two gill-arches a gill-slit.
He refused to accept Huschke's derivation of the auditory meatus from the first gill-slit.
He describes how in the embryo of the Blenny there is a short, thick arch between the first gill-slit and the mouth.