THE MANDIBLES AND MAXILLA. 



171 



ridge is continued into a process by which the mandible 

 articulates with the epistoma (fig. 47, A, ar). The endo- 

 p 



cxp 



Fm. 47. AstacvtfluviatUi*. A, mandible ; B, first maxilla ; C. second 

 maxilla of the left side ( x 3). ar, internal, and ar', external 

 articular process of the mandible ; bp, basipodite ; cxp, coxopodite ; 

 en, endopodite ; p, palp of the mandible ; sg, scaphognathite ; x t 

 internal process of the first maxilla, 



podite is represented by the three -j ointed palp (p), the 

 terminal joint of which is oval and beset with numerous 

 strong setse, which are especially abundant along its 

 anterior edge. 



