XI 



PHYLUM ARTHROPODA 



591 



The eye-stalks {E) are contained in orbits or sockets of the carapace, 

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

 antennules and antenna?. Both pairs of feelers are small, and the 



Fi<i. 409.— Typical Bracliyura (After Bell and de Ilaan.) 



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

 third maxillipedes (mxp.) are broad, flat, and valve-like, not leg- 

 like as in the Macrura. The first legs (1.1) form chelipeds often 

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



