II.] THE CRAYFISH AND LOBSTER. 239 



a. The great relative size of t\\z protopodite. 



ft. The increase in length of the endopodite over the 

 exopodite ; little marked but obvious in the case 

 of the abdominal appendage. (Cf. the cor- 

 responding abdominal appendage of the adult 

 Crayfish.) 



