428 



PHYLUM ARTHROPODA 



Fic. 240. — 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, otherwise called meso- 

 soma and mcta-soma. 

 7"., The post-anal spine or telson. 



