PLATE IV.
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FIG . 1. Section of liver showing " actino-body " round ovum
of S. spindalis.
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FIG. 2. Section of intestine showing " actino-body " round
ovum of S. spindalis.
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FlG. 3. Posterior end of male S. nasalis showing anastomosis
and diverticulae of the common caecum.
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FIG. 4. Section of lung of guinea-pig showing S. nasalis
and changes in the lung.