138 PLAT VHELMINTHES. 
jaundice lead on to death. The life-history clearly shows 
the reason why sheep incur this disease after grazing on 
damp pastures. 
At the anterior end is a blunt cone, at the tip of which 
opens the mouth in the centre of a sucker. 
The body tapers from two shoulders to a point. 
In the mid-ventral line, about yjth of its total 
length from the anterior end, is situated a second sucker. 
The body is of a dull yellow colour and enveloped in 
a thin cuticle, which forms hook-like pro- 
cesses or sfinules pointing backwards and 
scattered over the surface. 
External 
Features. 
Integumentary. 
Fig. 70.—TRANSVERSE SECTION THROUGH THE LIVER-FLUKE. 
(Déstomune.) 
(Somewhat diagrammatic.) 
Longitudinal Vas Deferens. 
Muscle. , Circular Muscles. Ovary. Ectoderm. 
Parenchyma. | - 
Cuticle. 
Intestine. Excretory Nerve Cord. 
Duct. 
The animal creeps about slowly by muscular contrac- 
tions. Under the cuticle are formed well-defined circular 
and longitudinal layers of muscles. The mouth leads into 
a sucking pharynx with muscular walls. This 
opens backwards by a short wsophagus into a 
large zntestine. The intestine forks into two main branches 
which run back to the hind end of the body. On their 
outer side they give off a great number of much-branched 
processes which end blindly at the edge of the body. 
Digestion appears to be purely intra-cellular. There is 
no anus. 
Alimentary. 
