mp 
Fig. 5. 
9e 
90 
Fig. 7. 
Fig. 6. 
cm 
aa 
Figs. 5 — 8. Monochoerus lineatus. 
Fig. 5. Transverse section through the middle of the 
body: bs, bursa seminalis; g, slime glaads; mp^ 
chitinous moath-piece; 0, 0', ova;pi!, parenchyma. 
150 diam. 
Fig. 6. Two copili ating individuals united by their 
ventral surfaces: ventral; dorsal surface. 
25 diam. 
(ivin 
pt 
fd 
br 
ps p 
ap gd bs mp 
Fig. 8. 
Fig. 7. Trans verse section through the region of the male reproductive organs: ge, genital glands; 
go, genital orifice; penis; vd, vasa deferentia. 150 diam. 
Fig. 8. Median longitudinal section through the entire worm; aa and ap, anterior and posterior 
adenodactylus ; br, brain: cm, circular muscles of the body wall; dvm, dorso-ventral musica 
Strands; fd, food; gd, genital duct; ms, muscles surrounding the mouth. 150 diam. 
