Tompsett, D.H. 1939. Sepia. Liverpool Marine Biological Committee Memoirs. 32: 184 pp. London. Williams and Norgate.
Plate 8, Figures 23-24.
Fig. 23. Dissection of the muscles of the funnel. The funnel has been opened by a longitudinal cut a little to the left of the middle line. Some of the skin of the ventral side of the head has been dissected away and part of the dorsal wall of the funnel has been freed from the head so that it could be turned back. The various muscles have been freed from the connective tissue which somewhat obscures them, and part of the cephalic vein (M.CE.V.) has been cut away, to show the diaphragm cartilage (D.CA.) lying immediately dorsal to it.