更多opercle例句

1. In Erpetoichthys only the opercle is distinct among the gill-covers.
2. The tip of its opercle is prolonged like an ear and jet black in color, with a dash of bright scarlet along its lower edge.
3. Overlying these is the system of membrane bones already mentioned, including the opercle or gill-cover.
4. On our sunfish we see that the opercle ends behind in a long and narrow flap, which looks like an ear.
5. The largest uppermost flat bone of the gill-covers is known as the opercle .