Figures 1–4

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SEM of cystacanths of Profilicollis altmani from Emerita analoga on the Peruvian coastline, Lima. 1. Entire female cystacanth showing proboscis, neck and trunk regions. 2. Entire proboscis. 3. An apical view of proboscis with external evidence of an apical organ (arrow). 4. Mid-part of proboscis with hooks embedded in furrows.
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