PLATE XXI. 



Class CBU STAGE A continued. 



THE LOBSTER continued. 

 APPENDAGES DISARTICULATED continued. 

 FIG. 11. SECOND WALKING LEG, CHELATE. x 1. 

 FIG. 12. THIRD WALKING LEG, NON-CHELATE. x 1. 

 FIG. 13. FOURTH WALKING LEG, NON-CHELATE. x 1. 

 FIG. 14. FIRST SWIMMERET : m. of male ; /. of female, x 1. 

 FIG. 15. SECOND SWIMMERET : m. of male ; /. of female, x 1. 

 FIG. 16. THIRD SWIMMERET. x 1. 

 FIG. 17. FOURTH SWIMMERET. x 1. 

 FIG. 18. FIFTH SWIMMERET. x 1. 

 FIG. 19. SIXTH SWIMMERET, WITH JOINTED EXOPODITE. x 1. 



Note. The numbers of the figures (11-19) correspond to the numbers of the 

 segments to which the various appendages belong. 



