heteronereis

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CIDE DICTIONARY

heteronereis, n. [NL. See Hetero-, and Nereis.].

A free-swimming, dimorphic, sexual form of certain species of Nereis. [1913 Webster]

" In this state the head and its appendages are changed in form, the eyes become very large; more or less of the parapodia are highly modified by the development of finlike lobes, and branchial lamellæ, and their setæ become longer and bladelike." [1913 Webster]

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