THE MYR1AP0DA. 



337 



Scorpions of large size have been found in the carbonifer- 

 ous rocks. 



The Mykiapoda. — In these Arthropods, the body is di- 

 vided into many segments, the most anterior of which takes 

 on the characters of a distinct head ; and almost all these 

 segments bear articulated limbs terminated by claws. In 

 the Centipedes (Chilopoda), the segments of the body have 

 broad sterna, and the bases of the limbs are far apart ; but, 

 in the Millipedes (Chilognatha), the sternal region is rudi- 

 mentary, and the bases of the limbs are close together,, 



Fig. 95. — A. Scolopendra borbonica (Chilopoda). B. lulus flavozonatus {Chih- 



gnatha). 1 



Moreover, in the latter group, the majority of the segments 

 of the body bear two pairs of limbs, and probably represent 

 two somites. 



15 



1 " Regne Animal." Illustrated edition. 



