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 



Fig. 45. — AstacHs fluviatilis.—K, the first ; B, the second maxillipede 

 of the left side ( x 3). cx^y^ coxopodite ; hj), basipodite ; e, hi', po- 

 dobranchia ; ej), epipodite; en, endopodite; f;r, exopodite ; ijp, is- 

 chiopodite ; tiqj, meropodite ; cjJ, carpopodite ; pp, propodite ; dp^ 

 dactylopodite. 



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

 coxopodite {cxp) and the basipodite (hp) are broad thin 

 jolates^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 



