Observations on Some Immune Reactions of the Sipunculid Worm Dendrostomum zostericolum

Abstract

The reactions of sipunculid worms to auto-and homo-coelomic transplants of tentacles were investigated. These transplants were encapsulated by host hemocy-tes in the coelomic fluid at rates independent of their origins. No en-chancement of phagocytic numbers of encapsulation rate was observed in the 2nd series transplants. No antibody production could be demonstrated following the injection of cellular or protein antigens.