Phagocytose et pinocytose par l'ectoderme et l'endoderme de Cerianthus lloydi Gosse

Starved Cerianthus lloydi Gosse were fed experimentally with Crangon muscles ground and impregnated with Bromocresol Green powder. A phagocytosis of the muscular fibres was detected in the cells of the endoderm layer of the sterile septa. In addition, through feeding with chicken blood, a phagocytosis became evident in the endoderm of sterile septa and of tentacles.The use of Ferritin allowed us to prove an uptake in all the endoderm cells of Cerianthus lloydi with an intensity which varies from one tissue to another. Furthermore, there is an unexpected pinocytosis in the ectoderm layer of the peristome, of pharynx, and the labial tentacles.Results obtained with bacteria and labelled amino acids are less conclusive. Perhaps the techniques used were inadequate.