xr 



PHYLUM ARTHROPODA 



573 



striking modifications. There are no chelae, the legs all ending in 

 simple claws : the antennae are of immense size, and their proximal 

 segments are fused with one another and with the carapace, quite 



2.Pala.emon. 

 Fia. 472. Shrimp (dorsal view) and Prawn (side view). (After Cuvier.) 



crowding out the epistoma : the rostrum is reduced, or even 

 vestigial, and the pleopods are very broad and fin-like. In Scyllarus 

 (Fig. 473) and its allies the body is broad and depressed, the bases 

 of the legs widely separated from one another by the broad 



