TABLE I. Systematic Survey of the Phylogenetic System of the Animal Kingdom founded on the 

 Gastrsea Theory and the Homology of the Germ Layers. 



TABLE II. Systematic Survey of the Phylogenetic Classification of Vertebrates. 



I. Skull-less (Acrania) or Tube-hearted (Leptocardia) Vertebrates, without a Specialized Head 

 Skull, Brain or Centralized Heart. 



skulless 



Aerania Tube-hearted Leptocardia 1 Lancelots 



\Amphioxida 



II. Animals with Skulls (Craniota) and with Centralized Hearts 

 Specialized Head, with Skull and Brain, and with a 



(Pachycardia), Vertebrates with 

 Centralized heart. 



