438 WILLIAM NICOLL. 
almost obliterate the cavity of the receptaculum. At irregular 
intervals in the epithelium of the oviduct there are single 
large cells, evidently the same as those observed by Looss in 
Br. palliatum.' Fora very short distance Laurer’s canal 
is also lined by ciliated epithelium, the cilia of which are 
directed towards the ovary, i. e. in a direction opposite to 
that of the cilia in the oviduct. It is evident that this, 
arrangement has some relation to the prevention of the 
escape of ova or sperms through Laurer’s canal. An analo- 
gous condition has been observed by Looss in Distomuin 
unicum Lss.* The remainder of Laurer’s canal is lined by 
a cuticularised epithelium. The ootype is lined by a regular 
non-ciliated epithelium. The cells of the shell-gland do not 
have the dense arrangement represented by Looss in Br. 
palliatum.’ They are fairly large cells, measuring ‘020 by 
‘012 mm., and nuclei ‘005 mm. 
The yolk-glands are richly developed, extending from the 
level of the pharynx to the posterior end of the body. They 
are mainly lateral, but their situation is not so much marginal 
as ventral and dorsal to the intestinal diverticula. Behind 
the testis they unite in the middle line, also to a slight 
extent in front of the genital aperture. he follicles are not 
very large, about ‘07-08 mm. diameter. The component 
cells are not well ditferentiated, owing to their containing a 
large number of bright yellow refracting granules, which are 
about ‘003 mm. in size. ‘These granules are very difficult to 
stain, remaining untouched long after the other tissues are 
deeply stained, but eventually they do take on the stain. I 
found that they did so more readily with saffranin and 
toluidine-blue than with heemalum and eosin. The small 
(‘004 mm.) round nuclei of these cells stain readily enough. 
I was quite unable to determine any differentiation between 
central cell and peripheral cells as in Stephanophiala 
L Opscrt:, pl. xxi, fig. 10. 
> “Recherches sur la faune parasitaire de Egypte”; in *‘Mém. 
Inst. Egypt,’ iii (1896), p. 49. 
’ * Zeitsch. f. wissen Zool.,’ xli, pl. xxiii, fig. 13. 
