::::型态描述.这些色彩丰富的海螺能够令部分身体的颜色与其躺卧的海床的色彩相同。Their large cephalic shield is rounded at the front, but deeply lobed behind. The外套膜protrudes behind the shell. The shell is partially or completely enfolded by lateral parapodial (=fleshy winglike outgrowths)