CPH 



AB 



FlG. I99A. Limulus or King-crab, dorsal surface. 

 From a Specimen. 



CPH., Anterior margin of vaulted cephalothorax or pro-soma. 

 M.E., Median eyes ; L.E., lateral eyes. 

 AB., Toothed lateral margin of the abdomen, other-wise called meso- 



soma and meta-soma. 

 T., The post-anal spine or telson. 



