THE MYRIAPODA. 



55 



Fig. 27. 



Fig. 27. — Anterior part of the body of Scolopendra Hopei (after Newport). — A, Anterior 

 part of the body from above ; B, from below ; A, head proper ; B, anterior thoracic 

 somites ; a, antennae; C, antenna?, labrum, and mandibles (iv') from below ; D, under 

 view of head, with the two pairs of maxilla} (v' VI 1 ) covering the foregoing. 



The Myriapoda (Fig. 27) have the chitinous integument ; 

 the body divided into somites, provided with articulated ap- 

 pendages ; and nervous and circulatory organs constructed 

 upon a similar plan to those of the former groups. The body 

 consists of more than twenty somites, and those which corre- 

 spond with the abdomen of Arachnida are provided with loco- 

 motive limbs. 



The head consists of at least five, and probably of six, coa- 

 lescent and modified somites, and some of the anterior segments 

 of the body are, in many genera, coalescent, and have their 

 appendages specially modified to subserve prehension. The 

 respiratory organs are tracheae, which open by stigmata upon 

 the surface of the body, and the walls of which are strengthened 

 by chit in, so disposed as readily to pull out into a spirally coiled 

 filament. 



The Insecta, lastly, have respiratory organs like those of 

 the Myriapoda, with a nervous and a circulatory system dis- 



