From this table we learn that the fibrin constitutes a remarkable index of the vital, 

 organic, and intellectual endowments of animals. 



In the whole of the invertebrate kingdom it is absent, except in a few of the 

 most highly organized, in which its presence is accompanied by a corresponding 

 improvement of the cerebro-spinal system, and all the organs. 



In the lowest orders of the Vertebrata, as Fishes and Batrachians, it is soft, 

 unstable, and readily convertible into albumen. 



In the Ophidians and Chelonians, although it is stable and does not dissolve, still 

 its structure is soft and inconsistent, and resembles, in many respects, the fibrin 

 which is formed when the vital forces of warm-blooded animals have been exhausted 

 by copious and continued bleedings. 



Here we have a beautiful demonstration of the fact, that the animal kingdom is 



