224 



DISCOVERY REPORTS 



from a corner at its distal extremity springs a group of particularly long setae. The 

 prow-like shape of the distal segment is further accentuated and, indeed, exaggerated. 



EXOPODITE 



ExoPODITE 



Fig. 7. Development of pleopods in Munida subrugosa. 



a. Second pleopod, fourth stage, male. e. Second pleopod, sixth stage, male. 



b. First pleopod, fourth stage, male. /. First pleopod, sixth stage, male. 



c. Second pleopod, fifth stage, male. g. Second pleopod, adult male. 



d. First pleopod, fifth stage, male. h. First pleopod, adult male. 



In each figure the left pleopod is shown. All the figures are to the same scale. 



It is not suggested that these stages described in the development of the pleopods 

 indicate different and successive moults or hard and fast stages. Variation occurs in the 

 combination of the different stages of development of the limbs, but invariably the 

 more posterior the limb the farther is it advanced in development. The stage at which 

 the limb may have arrived does not depend entirely upon the size of the animal, and 

 although there is a general advance in size according to the stage reached, considerable 



