PHYLUM ARTHROPODA 



591 



The ej'e-stalks (U) are contained in orbits or sockets of the carapace, 

 which are so prolonged that the eyes appear to arise behind the 

 antennules and antennae. Both pairs of feelers are small, and the 



Fig. 400.— Typical Bracliyur.i (After BcU>nd derHfiaii.) 



bases of the antennules are contained in sockets or fossctics. The 

 third ma.xillipcdes {m.vp.) are broad, flat, and valve-like, not leg- 

 like as in the Macrura. The first legs (U) form chelipeds often 

 of great size : the remaining legs generally end in simple claws, 



