260 



MANUAL OF ZOOLOGY 



SECT. 



Spiders. Limulus (Fig. 145), is a marine Arthropod, in 

 which the body consists of two regions, the cephalothorax 



ojberc 



FIG. 145. Ventral view of Limulus. / 6, appendages of cephalothorax ; aJ}d, 

 abdomen ; ceph. cephalothorax ; opcrc. operculum, behind which are seen the 

 seri s of abdominal appendages ; tels. caudal spine or telson. (After Leuckart.) 



and the abdomen. The former is covered over by a broad 

 shield or carapace, bearing two large compound eyes and two 



