506 BIOLOGY. 



3117. The Oozoa represent those products of nature 

 which are prior or antecedent to the animal world ; 

 namely, first of all plants, and further still the inor- 

 ganic kingdom also, or the earth, since they have 

 originated in the water and can be as well developed 

 from the stones as the Lichens. There are therefore 

 Lithozoa or Stone-animals, and Phytozoa or Plant-animals, 

 among the Oozoa. 



3118. Would we compare these animals with the 

 parts in plants, they then represent their cell-develop- 

 ment, or cells, bark and root. They are themselves either 

 vesicles, as the Infusoria, or barks, as the Corallines, or 

 a root-like fascicle of tubes, as the Acalephae. 



3119. In the animals, however, the cells have become 

 stomach, the bark intestine, the root absorbents. The 

 Oozoa represent therefore the aggregate of the intestinal 

 system, the primary mass of the animal body. 



Their whole body is a digestive body, or parenchyma, 

 traversed in many species in all directions by tubes or 

 absorbents, as in the Acalephae. 



As yet no nervous filament, nor any muscular fibre, 

 &c. has been separated from their mass, as in like manner 

 a tegument has barely been freed or separated from the 

 intestine. These animals are nerveless and sine-tegumental, 

 precisely because they are wholly made up of nervous 

 mass and tegument. 



Circle II. Vascular Animals. 



3120. In the next place the digestive separates com- 

 pletely from the tegumental function, and each constitutes 

 a function for itself, but which now being separated 

 from its fellow could no longer subsist. Between the 

 two therefore is formed the nutritive function in the 

 vascular system. 



Now, the vascular system of the self-substantial intes- 

 tine is the liver. This organ will therefore for the first 

 time make its appearance in this animal circle Hepatic 

 animals. Upon a higher stage, salivary glands are also 

 developed on the intestine, and will here likewise begin 

 for the first time to appear Salivary animals, Snails. 



