128 PARASITOLOGY. 



Key to Letters 



A — Anus. 



B — ^Vulva. 



C — External leaf crown. 



D-^Internal leaf crown. 



E — Oesophageal gland. 



F — Orifice of dorsal gutter of mouth capsul< 



G — Submedian head papillae. 



H — Ova. 



I — Mouth. 



J — Mouth capsule. 



K — Mouth collar. 



L — Oesophageal funnel, 



M — Rays. 



N— Web. 



O — Moult. 



P — Dorsal tooth of mouth capsule. 



Q — Lateral papillary nerve. 



R — Dorsal gutter of mouth capsule. 



S — Lateral head papillae. 



T— Teeth. 



U — Spiculae. 



