B central blood space div intestine
ep epidermis
f dorsal collar gate fold
h heart
kh gill intestine
im longitudinal musculature of the acorn
mh oral cavity, pharynx
nd dorsal nerve of the trunk
ndk neck lanyard
nv ventral nerve trunk
esophagus
eichelporus
rf groove ring collar
sk proboscis
sv eichelseptum ventral
vd gefässtamm dorsal
vv gefässtamm ventral. Date: 1893.
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