398 



ESSENTIALS OF ZOOLOGY 



A2 



Endopodite 

 Protopodite.:, 



External opening 

 of nephudium. 



^...•j Protopodite 



A.l 



Exopodite 



Endopodite 



Mx, 1 



M. 



_. Endopodite 

 Endopodite 



Exopodite 

 Endopodite 



Mp,l 



Epipodite 



Endopodite 

 Protopodite.,... 



Mp.3 



Endopodite . 



.. Exopodite 



Mx.2 



■••Epipodite 



Protopodite 



Epipodite 



Endopodite,, 

 Protopodite k 



Epipodite 



Fig-. 160. — Cephalic and thoracic appendages of the crayfish, ventral view. A.l, 

 antennule ; A. 2, antenna; L.i, fourtli walking leg: M, nianaioie: Alj/.l, firyt iiia\il- 

 liped ; M23.2, second niaxilliped ; 3I2J.3, third maxilliped ; Mx.l. first maxilla: .1/*S. 

 second maxilla. (From Newman, Outlines of General Zoology, The Macniillan 

 Company, after Kerr.) 



