Elementary text-book of zoology, general Elementary text-book of zoology, general part and special part: protozoa to insecta elementarytextbo00clau Year: 1892 Fig. 259.—Egg with embryo{o),and hatched larva (i) of PoJystomum integerrimum ; Dk, operculum (after E. Zeller).

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Photo credit: © Bookworm / Alamy / Afripics
License: Licensed
Model Released: No

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