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Centipedes have from fifteen to twenty pair of legs.

Centipede

Centipedes have from fifteen to twenty pair of legs.

A centipede.

Centipede

A centipede.

"Head of Scolopendra, from below, showing the epilabrum, the protomala with its cardo (Card), and stipes (St); Ant, antenna." -Whitney, 1911

Centipede Head

"Head of Scolopendra, from below, showing the epilabrum, the protomala with its cardo (Card), and stipes…

Millipedes have an indefinite number of legs.

Millipede

Millipedes have an indefinite number of legs.

"1 and 1, Egg and Larva of Iulus; 2, and 2, Iulus; 3, Polydesmus; 4, Glomeris; 5, Geophilus; 6, Lithobius; 7, Scutigera Longicornis" — Goodrich, 1859

Myriapoda

"1 and 1, Egg and Larva of Iulus; 2, and 2, Iulus; 3, Polydesmus; 4, Glomeris; 5, Geophilus; 6, Lithobius;…

"The Electric Scolopendra, <em>S. electrica</em>, is a European species, luminous in the dark." &mdash; Goodrich, 1859

Electric scolopendra

"The Electric Scolopendra, S. electrica, is a European species, luminous in the dark." —…