The Holocephali, or Chimasras 567 



sharks and chimeras. Some of these are serrated, others 

 entire, some straight, some curved, and some with elaborate 

 armature or sculpture. Some doubtless belong to Cestraciontes, 

 others to Pleuracanthida ; some to Sqnalida;, some to chimaeras, 

 and others, perhaps, to forms still altogether unknown. 



