SPECIFIC INHIBITION OF REGENERATION IN CLYMENELLA TORQUATA

¹ Department of Anatomy, Tulane University, New Orleans 18, Louisiana

1. Evidence is presented suggesting the presence of specific head-and tailinhibitors, and of even more specific dorsal-ventral intra-organ tail-inhibitors.

2. The tail-inhibitor is shown to be distributed along a posterior-to-anterior gradient.

3. Another substance, a "somatic factor," is postulated as existing along an anterior-to-posterior gradient.

4. The electrophoretic mobilities of the head-and tail-inhibitors at sea water pH are demonstrated.

5. The possibility of bioelectric control of the movements and concentrations of growth- and pattern-specific substances is briefly considered.