1 68 



SYSTEMATIC ZOOLOGY 



out. The body is then very soft, and the soft-shelled crabs of 

 the epicureans are captured at just this time. The animal then 



| \ 



. 



2.. Pala emon. 



Fig. 161. Crangon, the shrimp, dorsal aspect, and Paleemon, the prawn, lateral aspect. 

 (After Cuvier, from Parker and Harwell's Text-book.) 



swells and the skin begins to calcify until it is as hard as the 

 cast-off shell. 



