No foramen between third and fourth trochleae of tarso-metatarsus.
To this they are indebted for their name Foraminifera, from foramen, a hole.
The closure of the foramen is brought about by adhesion of the two septa.
The chalaza is at the insertion or base, the foramen or orifice is at the apex.
Micropyle, answering to the Foramen or orifice of the ovule.
The opening ...