8. Yoshida 
569 
dorsally to the isthmus. The gland receives the oviduct and yolk duct 
posteriorly; the other duct arises anteriorly, it is slightly coiled and 
runs dorsally to the vagina, and, about midway along the segment, 
it bends to open into the uterus, which is situated ventrally along the 
median line (PI. XXIII, figs. 10 and 11, JJ). In my specimens the uterus 
consists of a mere cell mass with a small central lumen not containing 
ova even in the posterior segments. 
The vagina (PI. XXIII, figs 10 and 11, V) opens into the common 
genital cloaca dorsally to the cirrus opening; tPence it runs inward 
in front of the cirrus pouch, bends backward, and upon attaining 
the ovarian region, it narrows and runs a winding course and unites 
with the oviduct. The vagina measures 0-04 mm. in width distally 
and 0-02 mm. in width proximally; it is widest a little in front of the 
isthmus. The vaginal wall is tolerably thick and is lined with a layer 
of cuticular spinules. 
Affinities. This worm bears some resemblance to C. laciniatum 
Linton, especially in the shape of scolex and in the laciniated border 
Ijo the segments, it differs, however, chiefly as follows: 
The presence of (1) the velum about the bothridial rim, and (2) of a 
central accessory sucker upon each bothridium ; (3) the mode of attach¬ 
ment of the bothridium in respect to the axis of the head; (4) difference 
in form of laciniated border at the different parts of the strobila; (5) 
difference in the shape of the last segment (in adult C. laciniatum the 
length and breadth are nearly equal, whereas in my specimens the 
length is much greater than the breadth); (6) the total length (110—212 
mm.) of C. laciniatum is much greater than in my specimens. 
Diagnosis. Length 30—40 mm. or a little more. Head provided 
with four cup-like bothridia, measuring 1-6 mm. in diameter. Both¬ 
ridium sessile or with short peduncle, turning forward and slightly 
outward, margin entire, thickened, surrounded by second membranous 
fold or velum; each bothridium measuring 0-5—0-6 mm. in diameter, 
provided with two accessory suckers, one on the anterior corner and the 
other central upon the bothridium; central accessory sucker weakly 
developed, appears as a mere depression or groove on the bottom of 
the bothridium. 
Strobila slender and delicate in the anterior third or fourth, widest 
and nearly uniform in breadth in the middle third or more, and a little 
narrower in the posterior third of body length. Cuticular wrinkles 
on the body are somewhat larger in the anterior, but very minute in 
the middle and the posterior part of strobila. Neck long, slender, 
