(三)唇足纲 Chilopoda ■ centipedes蜈蚣 ■ a pair of antennae Bodies very long, each egmont with a pair of egs. The first pair appendages modified into poison claws
（三）唇足纲Chilopoda ◼ centipedes蜈蚣 ◼ a pair of antennae. ◼ Bodies very long, each segment with a pair of legs. ◼ The first pair appendages modified into poison claws
(四)重足纲 Diplopoda millipedes马陆. ■ body segments fused into pairs Each apparent segment has two pairs of appendages
（四）重足纲 Diplopoda ◼ millipedes马陆. ◼ body segments fused into pairs ◼ Each apparent segment has two pairs of appendages