Note ff — BOOK IV.
Reading edition
S. Malpighi observed the Middle of the optick Nerve of the Sword-Fish, to be nothing else but a large Membrane, folded according to its Length in many Doubles, almost like a Fan, and invested by the Dura mater; whereas in Land-Animals it is a Bundle of Fibres. V. Phil. Trans. Nᵒ. 27.