ABSTRACT
Connective tissue is invaded by germ cells which multiply and give rise to spermatogonia. These cover the connective tissue rays and form seminiferous tubules. The principal anterior and posterior nidamental glands have the same structure as the oviduct gland. They are made up of stacked lamellae formed from a space in the glandular wall. During the second year of the cuttlefish's life, from September to April, there is an intense multiplication of cells in all the glands, into the epithelium of the mantle, formed from tubules buried in connective tissue. The activity is synchronized with that of other glands. Spawning occurs shortly after coupling, the male remains in visual contact with the female. Eggs are ejected at regular intervals over several hours. The female empties her entire ovary over several days. The methods of fertilization are still unknown: spermatozoa enter the oocyte through a central canal through the surrounding envelope which ends up by the micropyle.
