C. L. Boulenger 
•249 
INDEX TO LETTERING. 
a.h. accessory bursal membrane. 
an. anus, 
c. head. 
c. p. cervical papilla. 
d. dorsal ray of the bursa. 
e. d. externo-dorsal ray. 
e.l. externo-lateral ray. 
guh. gubernaculum. 
int. intestine. 
l. v. latero-ventral ray of the bursa. 
m. l. medio-lateral ray. 
n. r. nerve ring, 
oes. oesophagus. 
p. posterior narrow end of gubernaculum. 
p^. — p^. the three processes of the spicule. 
p.b.p. prebursal papilla. 
p.l. postero-lateral ray of the bursa. 
sp. spicule. 
v.v. ventro-ventral ray of the bursa. 
Parasitology vn 
17 
