426 MR. R. C. LEWIS ON 
Although the male organs are doubled the testes are not clearly 
divided into two groups. They are united in the median field 
of the proglottis. In OC. lagorchestis there are two distinct 
groups lying in dorsal anterior field of segment, next to ventral 
excretory canal, and not spreading further towards median field 
than the inner border of the cirrus-pouch or the outer border of 
the receptaculum seminis. In C. kuvaria the ovary is ventral and 
the vitelline gland dorsal, while in C. lagorchestis the ovary 1s 
dorsal and the vitelline gland ventral. There is a single uterus, 
and the receptaculum is covered with a star-shaped epithelium in 
C. kuvaria. In C. lagorchests the uterus is double, and there 1s 
no star-shaped epithelium covering the receptaculum seminis. 
Text-figure 3. 
° 
Sa ie 
Foon gon gonodson Oe 
a 
Transverse section through a lateral portion of Cittotenia quadrata von Linstow, 
from (20) fig. 3, p. 680. c, cirrus; %, nerve; g, excretory vessels; d, vitelline 
gland; s, shell-gland; , vagina; 7, receptaculum seminis; &, ovary; 
h, testes. 
C. quadrata von Linstow (20) shows very little resemblance 
with CO. lagorchestis. There are two longitudinal excretory vessels, 
a larger ventral and a smaller dorsal, and a longitudinal nerve 
dorsal to these, as in C. lagorchestis. The chief points of -con- 
trast are that the vagina runs out and opens dorsal to the 
cirrus in ©. quadrata; the receptaculum is small and dorsal to 
the ovary; the shell-gland is ventral to the vitelline gland, and 
the testes are dorsal to the ovary and extend in towards the 
median field. The eggs are four-sided and possess a pyriform 
body, and there is a single uterus, 
C. pectinata Goeze (21 and 25) was examined at the British 
Museum (Natural History). The head is not sharply marked off 
from the strobila as in C. lagorchestis, nor are the suckers, which 
are set on the rounded anterior extremity, so large and prominent. 
The lateral margins of each segment are rounded and not 
