MYKIAPODA. 
511 
the sides, disposed in fasciculi, and a pencil of ciliated scales at 
the hinder end; twelve pairs of feet. 
Polyxenus electricus. — The Electric Polyxenus. 
Plate XCV1I. fig. 4. 
Dusky-brown, with yellowish legs, of which there are about 
seventy on each side. Inhabits damp situations in Europe. 
ORDER II.—CHILOPODA. 
Antennae setaceous, many-jointed; mouth consisting of two 
mandibles and a small palpiform appendage; labium with many 
clefts, and two large palpi; two hook-formed feet, pierced at 
the tips for the emission of a poisonous fluid ; body with a cori¬ 
aceous or membranous covering; and each segment with two 
feet; having distinct spiracles. 
TRIBE I.-INiEQUIPEDES. 
With an elongated body, but not worm-shaped or linear, di¬ 
vided below into fifteen segments, each provided with a pair of 
feet, and are covered above with eight plates or scutelliform 
segments, which conceal the spiracles; feet elongated, the last 
pair exceeding the others, with a long jointed tarsus ; eyes large 
and compressed.—It has but one genus ; 1. Scutigera. 
TRIBE II.-JEQUIPEDES. 
Body linear, worm-shaped, with the segments above and be¬ 
low equal; feet equal, except the last two, which are long and 
caudiform ; eyes granulated ; the spiracles lateral. It contains 
five genera: 2. Lithobius ; 3. Scolopendra; 4. Cryptops ; 5. 
Geophilus. 
Genus 3.—SCOLOPENDRA.— Linnaeus. 
Generic Character.— The antennae conico-setaceous, and con¬ 
sisting of seventeen subconic articulations; mouth surmounted 
by hemispheric galeae; exterior palpi with a double peduncle; 
mandibles strong, horny; upper lip slit; segments of the body 
margined; anterior pair of feet small, the last pair being the 
