Peanut Worm - Interior Anatomy of Larva

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Sipunculus nudus. A species of unsegmented marine worm, commonly called the peanut worm. “B, Larval Sipunculus, about one twelfth of an inch long. o, mouth; oe, esophagus; s, caecal gland; i1, intestine with masses of fatty cells; a, anus; w, ciliated groove of intestine; g, brain with two pairs of red eye-spots; n, nervous cord; p, pore; t, t1, so-called testes; W, W, circlet of cilia.” —Whitney, 1889




William Dwight Whitney, PhD, LLD The Century Dictionary: An Encyclopedic Lexicon of the English Language (New York, NY: The Century Co., 1895) 5654


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