This hypothesis groups annelids with mollusks and brachiopods in another superphylum, Lophotrochozoa.
该假说将圆环类动物与软体动物和腕足动物归为另一类，冠轮动物。
Annelids are soft, moist worms which have rings around their bodies.
环节动物是柔软、黏湿的蠕虫，身体周围有环节。
A similar enlargement In the digestive tract of annelids and Insects.
环节动物或昆虫的消化道中的类似扩大部分。
Hermaphroditic terrestrial and aquatic annelids having bristles borne singly along the length of the body.
雌雄同体的陆栖和水栖环节动物，只在沿身体部位有鬃毛。
Both annelids possess a closed circulatory system with tubular hearts and a dorsal and ventral blood vessel. In both specimens, pin the following.
二种环节动物皆具有闭锁循环系，包括管状的心脏及背血管，腹血管。用大头针标示二标本的下列构造：。
Both annelids possess a closed circulatory system with tubular hearts and a dorsal and ventral blood vessel. In both specimens, pin the following.
二种环节动物皆具有闭锁循环系，包括管状的心脏及背血管，腹血管。用大头针标示二标本的下列构造：。
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