598 



ARTICULATA. 



MTRIAPODA. 



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



7, Scutigera Longicornis. 



Class II. ]?IYRIAPOI>A. 



The small class of Myriapod'a is in its general characters very closely allied to the insects, 

 although in some respects it appears to approach the Crustacea. In the mature state, their bodies 

 are generally elongated, and composed of numerous segments, the articulations of the body being 

 similar, and bearing each one or two pairs of jointed legs. The head always has a pair ot 

 jointed antennae, very similar to those of many insects, and behind the insertion of these, on 

 each side, is a variable number of simple eyes, which, however, are sometimes wanting. The 

 mouth, in its general structure, bears a considerable resemblance to that of the masticating 

 insects, being furnished with jaws, palpi, and an upper and lower lip. In their internal anatomy 

 these animals also exhibit a great resemblance to the insects. Their nervous system consists 

 of a series of ganglia running along the ventral portion of the body, and usually united by a 



