562 S. H. SCDDDER ON FOSSIL MYRIAPODS. 



anterior ridge, the size and position of the lateral pores, and the length and position of the 

 legs. 



Fig. 6 is reduced from a camera sketch of Archiidus xylobioides to show the tapering of 

 the anterior extremity of the body. The posterior segments of the specimen are greatly 

 worn, and do not exhibit the anterior ridge ; anteriorly the body is not very well preserved, 

 and all the hnes shown are not the division Hnes of segments ; nor is the anterior segment 

 a correct representation of the head; so that the figure answers only for the general 

 outhne. 



Fig. 7 gives the antennal joints of Archiidus xi/Iohioides, showing their close general re- 

 semblance to those of the larval antenna of recent myriapods. 



