PHYLUM ARTHROPODA — CLASS CRUSTACEA 



269 



A2 



Endopodite 

 Protopodite.:." 



External ope'ning 

 of nephtidium. 



..3 Protopodite 



A.l 



Exopodite 



Endopodite 



Mx.l 



Exopodite 

 Endopodite 



Mp.l 



Epipodite 



Endopodite 

 Protopodite,.,. 



Mp,3 



Eindopodite.., 



M. 



^.Endopodite 



Endopodite 



Exopodite 



Mx,2 



•Epipodite 



Mv.2 



Exopodite 



Protopodite 



Epipodite- 



Endopodite 

 Protopodite k 



Epipodite 



.ChitinouB thrrada 



Fig. 153. — Examples of cephalic and thoracic appendages of the crayfish, ventral 

 view. A. 1, Antennule ; A. 2, antenna ; L. i, fourth walking leg ; M, mandible 

 Mp. 1. fir.st maxilliped ; Mp. 2, second maxilliped : Mp. 3, third maxilhped ; Mx. 1, 

 first maxilla; Mx. 2, second maxilla, (From Newman, Outlines of General Zoology, 

 published by The Macmillan Company, after Kerr.) 



