11. The malacia have no viscus, except that which is called the mytis,[104] and the ink which is upon it. The most abundant and largest of all is that of the sepia; all exclude this ink, when alarmed, but especially the sepia; the mytis lies beneath the mouth; and through this the œsophagus passes; and where the intestine turns back the ink is beneath, and the same membrane surrounds both the ink and the intestine. The same orifice serves for the emission of the ink and the fœces. [104] Köhler supposes the part called by Aristotle _mytis_ to have been the glandular appendages on the vena cava and two visceral veins. (_Owen in Todd's Cyclopedia of Anatomy, Art. Cephalopoda._) 12. There are some appearances of hair[105] in their bodies; the sepia, teuthis, and teuthos, have a hard part upon the forward part of the body; the one is called sepium (the bone of the cuttle-fish), the other xiphus (the pen of the loligo). These two are different; for that of the sepia is strong and wide, partaking of the nature of spine and bone, and it contains a spongy, friable substance; but the pen of the teuthis is thin, and cartilaginous. In their form also they correspond with the differences of the animals themselves. The polypus has no hard internal part, but a portion of cartilage round the head, which becomes hard as they grow old. [105] Probably the branchia. 13. The females also differ from the males, for the latter have a passage beneath the œsophagus, extending from the brain to the lowest part of the body. That part to which it reaches is like a teat. In the female there are two such organs, which are placed above. In both sexes, some small red bodies are placed under these. The polypus has one capsule of eggs, which is uneven on the surface; it is large; internally it is all of a white colour, and smooth. The multitude of the ova is so great as to fill a vessel larger than the head of the polypus. 14. The sepia has two capsules, and many eggs are in them, like white hailstones. The position of each of these parts may be seen in anatomical diagrams. In all these creatures the male differs from the female, and especially in the sepia. The fore part of the abdomen of the male is always darker than the back; and more rough than in the female, and variegated with stripes, and the extremity of the body is more acute. 15. There are many kinds of polypus; one, which is the largest of all, is very common. Those near land are larger than those which are caught out at sea. There are smaller kinds, which are variegated; these are not articles of food; and two others, one of which is called eledone,[106] differs in the length of its feet, and is the only one of the malacia with a single row of suckers, for all the rest have two; the other is called bolitæna,[107] and sometimes ozolis. [106] Eledone moschata.--_Leach._ (_Owen._) [107] Eledone cirrosa.--_Leach._ (_Owen._)