Gill worm - Gill worm

Japanese: エラヒキムシ(鰓曳虫) - エラヒキムシ

A general term for a type of pouched animal belonging to the Priapulidae family of the class Priapulidae, or one of these animals. They are often treated as part of the phylum Priapulidae. They are worm-like marine animals that look like star worms and live in sand and mud on the ocean floor at depths of 10 to 700 meters. Their body is divided into a prosome and a trunk, and the prosome can be retracted into the body. At the rear end, there are one or two appendages that form a cluster of hollow sacs. Small spines and papillae are scattered irregularly on the surface of the body, and there are many segment-like constrictions.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

プリアプルス綱プリアプルス科Priapulidaeに属する袋形動物の総称，またはそのうちの1種を指す。鰓曳動物門として扱うことも多い。一見ホシムシに似た蠕虫（ぜんちゆう）状の海産動物で，水深10～700mの海底の砂泥中にすむ。体は前体と胴部に分かれ，前体は体内に引き込むことができる。後端には中空の袋が集まって房状になった付属器が1～2本存在する。体の表面には小さなとげと乳頭状突起が不規則に散在し，環節様の多くのくびれがある。

出典　株式会社平凡社世界大百科事典第２版について　情報

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