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Keywords from Image Description:
Poliopsis lacazei by Joubin. en Ribbon worms Poliopsis lacazei Nemertea Heteronemertea Valenciniidae Entire specimen left and head in dorsal view right Joubin Recherches sur les Turbellaris des ctes de France Nmertes Archives de zoologie expimentale et gnrale Srie biodiversitylibrary org page Plate XXV Louis Marie Adolphe