H. Kobayashi 
387 
the ventral sucker, lying symmetrically or obliquely, margin irregularly 
sinuate. Ovary situated slightly posterior to the left testis, rounded or weakly 
sinuate. Vitellaria extending throughout the middle third of the body-length. 
Eggs 0-042-0-045 mm. x 0-025 mm. Habitat: the liver of Macacus speciosus. 
Description. This species was found in the liver of a Japanese monkey, 
Macacus speciosus. Several specimens were collected by M. Miyajima in 1910. 
Body lanceolate, 4-5-5 mm. in length by 1-1-5 mm. in width in the broadest 
part 1 . 
The greatest width is reached at the anterior third or fourth of the body- 
length, where the ovary and the testes are situated (PL XXIV, figs. G and 7). 
It narrows more abruptly anteriorly than posteriorly. In some specimens, the 
broadest part is reached at the posterior third of the body-length (like Dicro- 
coelium lanceolatum) (PI. XXIV, figs. 5 and 8). 
The cuticle is provided with numerous fine conical protuberances especially 
in the anterior part of the body. These become gradually indistinct posteriorly. 
The oral sucker lies at the anterior end. It has a round form, and a diameter 
of 0-25 mm. The ventral sucker is situated at the anterior sixth or seventh 
of the body-length and is slightly larger than the oral, the diameter being 
0-32 mm. 
The oral sucker is continued directly to the pharynx which is 0-06 mm. 
in length. The oesophagus is 0-1-0-2 mm. in length and bifurcates into the 
intestinal caeca midway between the oral and ventral suckers. The intestinal 
caeca are slender and end at the posterior third of the body-length. They 
often differ from each other in length. 
The excretory pore opens at the posterior end. The unpaired part of the 
vesicle runs anteriorly and reaches almost as far as the posterior border of 
the ovary, where it divides into two arms. Both arms turn laterally, almost 
perpendicularly, and pass exterior to the intestinal caeca. Each of them again 
divides into anterior and posterior branches, which run along the lateral body 
margin. 
Several gland cells lie on the lateral side of the oesophagus. The glandular 
ducts run independently forwards and find their opening on the dorsal side 
of the oral sucker. The contents of these gland-cells and their ducts are 
eosinophile. 
The testes lie directly posterior to the ventral sucker. In certain elongated 
specimens in which the broadest part is found anteriorly, the right testis lies 
anterior to the left (PI. XXIV, fig. 7). In certain other specimens, which have a 
similar shape to the above, the testes lie side bv side (PI. XXIV, fig. 6). In those 
specimens, in which the broadest part of the body is situated at the posterior 
region, both testes lie usually side by side in the same level ( PI. XXIV, figs. 5 
and 8). The shape of each testis is lobate or irregularly square, with a diameter 
of about 0-4 mm. 
1 Measurements from specimens preserved in alcohol, after fixation in sublimate solution 
under slight pressure. 
