. Elementary text-book of zoology. 138 PLATYHELMINTHES. 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 External °P^"^ ^^ mouth in the centre of a sucker. Feat "^^^ body tapers from two shoulders to a point. In the mid-ventral line, about y^^th of its total length from the anterior end, is situated a second sucker. The body is of a dull yellow colour and enveloped in T„t„^,„.„4. , a thin cuticle, which forms hook-like pro- cesses or spinules pomtm
. Elementary text-book of zoology. 138 PLATYHELMINTHES. 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 External °P^"^ ^^ mouth in the centre of a sucker. Feat "^^^ body tapers from two shoulders to a point. In the mid-ventral line, about y^^th of its total length from the anterior end, is situated a second sucker. The body is of a dull yellow colour and enveloped in T„t„^,„.„4. , a thin cuticle, which forms hook-like pro- cesses or spinules pomtmg backwards and scattered over the surface. Fig. 70.—Transverse Section through the Liver-Fluke. {Distojniwi.) (Somewhat diagrammaLic.) Longitudinal Muscle. Parenchyma. ^ Vas Deferens. Circular Muscles. Ovary, 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 Alimeatarv ^ sucking pharynx with muscular walls. This opens backwards by a short asophagus into a large intestine. 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 Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Masterman, Arthur Thomas. Edinburgh, E. & S. Livingstone
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