Tompsett, D.H. 1939. Sepia. Liverpool Marine
Biological Committee Memoirs. 32: 184 pp. London. Williams and Norgate.
Plate 10, Figures 30-35 .
Fig. 30. Posterior view of a
transverse section of the left fin, taken at about the middle of the fin. This
figure shows only the swimming muscle of the fin, and the fin cartilage. The
skin covering the swimming muscle, and the muscles and membranes attached to
the fin cartilage have been removed. The cut surface of the swimming muscle
shows muscle fibres running in three directions, longitudinally, laterally and
dorso-ventrally. The details of the muscle fibres were taken from transverse
sections of a very young specimen viewed under the microscope.
Fig. 3I. Mesial view of the
left fin cartilage (FI.C.), together with the muscles and membranes attached
to it.
Fig. 32. Dorsal dissection of
the back to show the relations of the fin (FI.) to the shell (SH.) and mantle
(M.M.), and also to show the dorsolateral and posterior conjunctive fin
muscles. (D.F.M. and P.F.M.).
Fig. 33. Ventral view of the
diaphragm cartilage (D.CA.) to show its foramina, and the muscles attached to
it. It has been exposed by removing the funnel, and dissecting away the cephalic
vein, which is attached to it.
Fig. 34. Dorsal view of the
nuchal cartilage. The origin of the inner and outer collar muscles (I.C.F. and
O.C.F.) of the funnel have been left attached on one side.
Fig.
35. Ventral view of the dorsal cartilage. The muscular mantle and the
retractor muscles of the head and funnel, which have their origin on the
posterior part of this cartilage, have been dissected away. Posteriorly this
cartilage is very thin, and indefinite in outline, consisting of a tough
membrane, reinforced by a little cartilage.
Key to Abbreviations
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