128 PARASITOLOGY. 
Key to Letters 
A—Anus, 
B—Vulva. 
C—External leaf crown. 
lb—Internal leaf crown, 
E—Oesophageal gland. 
F—Orifice of dorsal gutter of mouth capsule. 
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. 
\J—Spiculae. 
