Mobile creatures, whose number is legion, are of two sorts, viz., those that are many legs and those that have two. The latter, however, are superior to the former.
आहुः बहुपादानि जङ्गमानि द्वयानि तु। बहुपाट्यो विशिष्टानि द्विपदानि बहून्यपि॥