PLATES 
ABBREVIATIONS 
B.M., basement membrane 
C.M., circular muscles 
C.M.F., plug cells oriented to circular 
muscle pull 
Ciz., cicatrix 
D.Ep., degenerating epithelium 
Ep., epithelium 
Gang., ganglion cells 
G.C., gland cells 
G.F., giant fibers 
Int., intestine 
L.F., central longitudinal nerve fibers 
L.M., longitudinal muscles 
L.M.F., plug cells oriented to longi- 
tudinal muscle pull 
Mes., mesenteries 
N.C., nerve cord 
Pl., plug cells 
PI1.F., plug fibers 
R.C.M., regenerated circular muscles 
R.L.M., regenerated longitudinal mus- 
cles 
R.Ep., regenerated epithelium 
Sh., sheath of the cord 
S., strand 
Sub., subneural vessel 
Vent., ventral vessel 
G.Nep., glandular part of the nephrid- 
ium 
S.Nep., saecular part of the nephridium 
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THE JOURNAL OF COMPARATIVE NEUROLOGY, VOL. 33, NO. 2 
