PLATE XXVI. 



Class PCE GIL OPODA. 



THE KING CRAB (Zimulus). 



FIG. 1. LIMULUS : VENTRAL VIEW, x |. 



a. " antenna " : c. cephalo-thoracic shield : ab. abdomen : t. caudal 

 spine or " telson " : o. operculum : p. plates bearing gills. 



FIG. 2. LIMULUS : DORSAL VIEW, x J. 



e. 1 compound eye: e. 2 simple eye. 



Class PYCNOGrONIDJE. 



THE NOBODY CRAB (Pycnogonum}. 

 FIG. 3. PYCNOGONUM : DORSAL VIEW, x 3. 



Class LINGTJATTJLID^l. 



Pentastomum. 

 FIG. 4. PENTASTOMUM. x 10. 



