A small tropical cephalopod of the genus Spirula having prominent eyes and short arms and a many-chambered shell coiled in a flat spiral. 旋壳乌贼属的热带小型头足类动物,眼睛突出,臂短,多个隔间的壳卷成扁平的螺旋状。
Genus of small cephalopods with many-chambered spiral shells resembling those of the extinct belemnites. 一种小的头足类动物,外壳呈多室螺旋状如已绝迹的箭石。