48 
Tapeworm from a Parakeet 
two almost immediately. The more interior branch if) goes straight 
to the core found in the rostellum and reaches it almost at its lateral 
side: here it disappears. The remaining branch f) skirts the rostellar 
core just mentioned and bends round anteriorly to this to enter the 
centre of the rostellum. 
Genital Organs. 
In each proglottis are two complete sets of genital organs, the ducts 
from which open on the opposite sides of the segment (PL VI, fig. 3). 
The genital pores are dorso-lateral and are situated at the anterior 
Fig. 4.—Reconstruction of the nervous system, h. Anterior nerve mass. 1. Anterior 
lateral nerve. I', I". Its two branches, l.n. Longitudinal nerve, s.n. Nerve to 
sucker 
third of the segment. There is a common genital sinus running 
0-102 mm. into the proglottis. It has a short ventral course and then 
a longer transverse one. Into the bend marking the junction between 
