166 



THE MORPHOLOGY OF THE COMMON CRAYFISH. 



The second maxillipede (fig. 45, B) has essentially the 

 same composition as the first, but the exopodite (ex) is 

 relatively larger, the endopodite (ip dp) smaller and 

 softer; and, while the ischiopodite (ip) is the longest 

 joint in the third maxillipede, it is the meropodite (mp) 

 which is longest in the second. In the first maxillipede 



B 



FIG. 5.Astacmflm-iatilis.k, the first ; B, the second maxillipede 

 of the left side ( x 3). c.rp, coxopodite ; bp, basipodite ; e, br, po- 

 dobranchia ; ep, epipodite ; en. endopodite; e y, exopodite ; ^is- 

 chiopodite ; mp. meropodite ; cp, carpopodite ; pp t propodite ; dj>, 

 dactylopodite. 



(fig. 45, A) a great modification has taken place. The 

 coxopodite (cxp) and the basipodite (bp) are broad thin 

 plates with setose cutting edges, while the endopodite 

 (en) is short and only two-jointed, and the undivided 

 portion of the exopodite (ex) is very long. The place of 



