610 à A.-E. SHIPLEY 
in the longitudinal muscles which sometimes show a striation 
almost similar to that of striated muscle-fibre but this is probably 
caused by the muscle in question being thrown into a crinkled or 
undulating form. These longitudinal bundles are quite irregularly 
arranged, scattered fairly uniformly through the parenchyma but 
in no ways dividing the parenchyma into cortical and central 
portions. On the whole the larger bundles lie more superficially 
than the smaller but beyond this no definite arrangement can be 
made out. 
The water-vascular system begins in the head with two longitu- 
dinal ducts which very quickly give of lateral branches anasto- 
mosing in all directions. At the posterior end of the body the 
lumen of the various canals is much enlarged : large spherical 
spaces take up a considerable portion of the otherwise solid 
substance of the body. The system opens to the exterior, as figure 8 
shows, at about the centre of the somewhat squared posterior end. 
Scattered throughout the body are very many calcareous bodies 
each lying in a little cyst in the parenchyma. These are more 
numerous anteriorly than posteriorly. At first sight these bodies 
are readily mistaken for ova, but they dissolve in acetic acid and 
présent a close resemblance to the calcareous bodies of other 
Bothriocephalidae. 
Anteriorly, a little way behind the single median sucker, lies a 
glandular looking body, consisting of rather refrigent looking, 
minute, rounded cells. In section where alone the gland — ifit 
be a gland — is visible, it resembles somewhat a vitellarium and 
it may possibly be the primordium of the vitellarium of the 
sexually mature worm, but this does not seem very probable. 
There is no trace of ovary, testis or any other reproduclive organ. 
The zoological position of this animal is obscure and in the 
absence of sexual organs is in fact undeterminable. The animal is 
obviously a larva and very closely corresponds with the Bothrioce- 
phalus Mansoni of Cobbold (1) . This has been found in the connec- 
tive tissue underlying the peritoneum of certain Chinese and 
Japanese. That both larvae belong to the family Bothriocephalidae 
(4) Die Parasiten des Menschen, 2 Auflage, 1878-1886 ; cf. I, p. 941. — Cf. also 
CosBozv, Description of Ligula Mansoni. a new Human Cestode. J. Linn. Soc., 
Zoology, XXVI, 1885, p. 79. 
