MONOGRAPH OF THE EXISTING CRINOIDS. 



151 



or insect bodies united by the possession of a single head iu common from which 

 center five of the bodies, radiating outward, represent the five rays of the crinoi.l 

 while the sixth represents the column. 



The question which of the intermetameric divisions m the echmoderms rep- 

 resents the plane of union between the originaUy free and opposite anterior and 



vnrxo SPEOMEV Of PiaOMETKA «ACBOKEMA KKOM SOCTH^STEBN AUSIKAUA. 8HOWK0 THE 

 F.G. 92.-LATEEAL VIEW OF A TOTOO ^«^^,°^f^„^^.<, ,„^ ,pvLT TVPE. 



or projected upon a fundamentally radial body. 



