(from Coe, W. R. (1905). Nemerteans of the west and northwest coasts of America.. Bull. Mus. comp. Zool. Harv.. 1-318)
This species occurs very abundantly on the west coasts of Panama and Mexico, and at the Galapagos Islands, but has not been found elsewhere. It belongs to that group of the genus having slender bodies which do not contract to any excessive amount when disturbed or killed. The worms reach a considerable size, those one or two meters long and 5-7 mm wide being common. Specimens in collections often measure at least half a meter in length. In shape the body is slender, flattened when strongly contracted, largest just back of head; intestinal region broad and flat; posterior extremity very slender. Snout of moderate size, distinctly marked off from posterior portion of head by conspicuous lateral transverse grooves which form an annular constriction when contracted. Ocelli numerous, situated in an elongated cluster on each lateral border of snout.
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