2l8 MANUAL OF ZOOLOGY. 



name of Zoea (fig. 73), presenting in this condition a long and 



Fig. 72. Brachyura. The Spiny Spider- Crab (Maia squinadd). 



well-developed abdomen. It is only after several successive 

 moults that the young Crab assumes its characteristic Brachy- 



Fig. 73. Larva (Zoea) of Crab (Pirimela denticulate?), magnified after Kinahan. 



urous form, and acquires by gradual changes the features which 

 distinguish the adult. 



