460 



ABTimOPODA. 



Vjeiiig considered here, the Diplopoda as a distinct class at the end of the 

 group of Arthropoda. 



Suh Class I. Chilopoda. 



The most striking cliaracteristio of the chilopods is their iong, 

 flattened bodies, each of the numerous somites bearing a pair of 



Fio. 481.— Diagram of transverse section of a centipede (orig.). (I, digestive tract; g, 

 gonad; n, nerve cord ; s, spiracle and trachege. 



/^ 



7i 



/ 



Fig. 48:;. Fig. 483. 



Fig. 483. — Moiitli parts of .s'('n/n/»rur?ra »?inr.s(7rt?i.'^. 7, antenna^ ; .\ mandibles: 5, mas- 



iUa5; A, si'cnnil jiiaxillic (lal)iuin): •'>, jioison feet. 

 Fig. 48:i.— Ncu/n^yrM'/nl nio/-.si;(.fM,s, rontipedc. (After Schniarda.'l 



si-x- or seven-jointed limlis. Tlie head bears a pair of long antenn;"e 

 and usually numerous ocelli, which only in Scutigera show a ten- 



