THE EPIDERMAL LINES OF OCTOPUS-VULGARIS LAMARCK, 1798, AND SEPIOLA-AFFINIS NAEF, 1912 (MOLLUSCA, CEPHALOPODA) AT HATCHING STATE

Late embryonic stages and hatchlings of Octopus vulgaris Lamarck, 1798 , and Sepiola affinis Naef, 1912, have epidermal lines consisting of c iliated cells and accessory cells, respectively. O. vulgaris shows 4 p airs of bilateral symmetrical lines containing ciliated cells in the e pidermis of the arms, the head and the mantle and one single line in t he funnel epidermis. S. affinis has 5 pairs of bilateral symmetrical l ines on the head, 4 on the arms and a band of ciliated cells on the fu nnel. The epidermal lines of O. vulgaris show 2 different types of cil iated sensory cells. The funnel line has a different structure. The ep idermal lines of O. vulgaris and S. affinis correspond to the ones tha t have already been described for Loligo vulgaris Lamarck, 1798, and S epia officinalis Linne, 1758. They an regarded as an analogue of the l ateral line system of fish.