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１引言 嵌线螺科（Ｃｙｍａｔｉｉｄａｅ）为肉食性中腹足类，在其贝壳的前唇有长短不一的水管沟，水管可以由水管沟中伸出，在外形上与草食性腹足类显著不同．嵌线螺的头部有一圆柱形的能大幅伸缩的吻，口位于吻的前端；在吻的基部、食道的上方有一由唾液腺特化而成的腺体，该
1 Introduction The family Cymatiidae is a carnivorous gastropodopathic species of water ditch with varying lengths in the front lip of its shell. Water mains can protrude from the mainspit and are significantly different in shape from herbivorous gastropods . The snail’s head has a cylindrical can greatly retractable kiss, the mouth is located in the front of the kiss; at the base of the kiss, above the esophagus has a gland made of salivary glands, the