The fins of Pteropods are now interpreted as the expanded lateral margins of the foot, termed parapodia, not homologous with the siphonof Cephalopods which is formed from epipodia.
- A plysia leporina (camelus, Cuv.), with epipodia and mantle reflected away from the mid-line.
46, B), possibly a continuation of the epipodia; b, b', cephalic tentacles.
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