R E G E N E R A T I O N I N A N N E L I D S
201
50-η
I
Control
Number of segments regenerated
FIG. 28. Nereis diversicolor. Effect upon regeneration of extirpation of the supraoesophageal ganglion at various times after amputation of the posterior segments.
Controls: ganglion intact throughout. O, No regeneration; P, pygidium regenerated; V,
vascularized pygidium regenerated ; succeeding numbers indicate the number of segments
proliferated. The number of worms represented by each block is indicated above the
block. (Clark and Evans, 1961.)
201
50-η
I
Control
Number of segments regenerated
FIG. 28. Nereis diversicolor. Effect upon regeneration of extirpation of the supraoesophageal ganglion at various times after amputation of the posterior segments.
Controls: ganglion intact throughout. O, No regeneration; P, pygidium regenerated; V,
vascularized pygidium regenerated ; succeeding numbers indicate the number of segments
proliferated. The number of worms represented by each block is indicated above the
block. (Clark and Evans, 1961.)