Introvert 
te 
Lower lip —-°) 
i 
Ven. Nerve Cord 
Fig BE 
Dorsel bl.ves. 3 Base of Lophophor = 
s 
—F 
ei 
praeorallobe 
i ee & { | 5 -@uticle Fig. 8. 
Chitinaus ting 
Epidermis 
x Cutele 
a ar 
oe Sub.epid. Space FN ——_Y 
4a wet 
Fetrector musel: Pig. 10 Cire. museles >, 
soe 
Lj t 
Epidermis 
Pigmented skin of 
praeoral lobe 
“Cuticle 
Bl sinus at ‘-- 
Cire muscles 
Fig 11 Fig 13 
Epidermis 
Base of Lophophor 
