F. J. Meggitt 
305 
The scolex (PL XVI, fig. 7) is attached to several villi which, free at first, 
in course of time become fused together into a solid mass at their distal ends 
but with the proximal ends still showing traces of their original formation. 
To this thickened lump the scolex fixes itself by the rostellor hooks. The 
centre of the rostellum, instead of being applied closely to the mass of villi, 
retracts, so as to leave between the scolex and the intestine a conical cavity, 
often partially filled with mucous, round the circumference of whose base 
the rostellum is still firmly fixed by its hooks. The suckers appear to play 
a temporary part in the fixation of the worm to the intestine; immediately 
on death they relax their hold while the rostellum generally remains firmly 
imbedded. The scolex may hang freely in the lumen of the intestine or may 
be sunk among the villi, but it never penetrates the submucosa. 
Text-fig. 1. Cotugnia fastigata n. sp., Hook from Rostellum. 
The musculature (PL XVI, fig. 6) consists of three layers of longitudinal 
muscles each bounded internally by a thin layer of transverse ones. The 
innermost longitudinal musculature (l.m.) consists of a number of fibres aggre¬ 
gated together into large irregular bundles; the bundles of the middle layer 
(L.m'.) are smaller, more compact, composed of fewer fibres, and arranged 
more regularly, while externally to them isolated fibres (L'.m".) extend up 
to the cuticula. 
The dorsal longitudinal excretory vessels are absent from proglottides con¬ 
taining genital organs; the ventral persist to the posterior end of the strobilus, 
and communicate by the usual transverse commissure at the posterior border 
of each proglottis. 
The genital pore (PL XVI, fig. 5) is situated at the limit of the anterior 
quarter of the proglottis margin, and into it open anteriorly and posteriorly 
the cirrus-sac and vagina respectively. 
The testes ( t .) extend as a narrow band along the posterior border of the 
proglottis. Antero-posteriorly, this band has a uniform width, consisting of 
two to three rows of testes; dorso-ventrally, it is thickest laterally where 
