94 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
eosin, and appear to be crowded with coarse granules. 
They might be (and probably have been in other 
Trematodes) called salivary gland cells. and this name 
is as good as any other, though we have not, of course, 
any direct evidence that they pour a digestive secretion 
into the vestibule. 
‘ 
I have not seen anything like the “ sticky glands ”’ 
mentioned by Gotto* as occurring in Monocotyle ijimae; 
but everywhere in the animal, just beneath the muscular 
integument, are cells, which one may loosely call sub- 
cuticular. In the region of the pharynx and anterior 
sucker, these cells are larger and more numerous than 
elsewhere. They are rather smaller than the mucoid cells 
described above, and they stain quite differently, taking 
a purple coloration from methyl-blue-eosin instead of a 
full red. They appear to send prolongations towards the 
integument, and one can sometimes see delicate canals 
piercing the latter. I think it is groups of these modified 
sub-cuticular cells that are described by Gotto as the 
sticky glands. 
The Male Genital Organs. 
Testis. There is only one testis in the species here 
described, and this condition causes the species to occupy 
an isolated position among Tristomidae and Monocoty- 
lidae. The testis is situated immediately behind the 
ovary, and is elongated transversely. In sections there 
are indications of the existence of transverse connective 
tissue partitions, but there is no doubt that the organ is a 
single one. In cleared preparations one sees cords or 
groups of testicular follicles arranged serially, but the 
study of sections seems to show that the follicles within the 
*Op. cit., p. 38. 
