100 THE FRESH- WATER CRAYFISH— THE CAPE CRAWFISH 



Draw the third and first walking legs, and the third, second, and first 

 maxiUipeds. 



C. The Five Head Appendages of the I^eft Side. 



These are modified chiefly into sensory and oral organs. 



(a) The second maxilla is situated in front of the first maxilliped but towards 

 the side of the body. The protopodite consists of two thin lamellar 

 plates (coxopodite and basipodite) subdivided by deep fissures. The 



