ZOOLOGY. 



615 



Second Province. 



FOURTH CIRCLE SARCOZOA. 



Pisces, Eeptilia, Aves and TJiricozoa. 



3530. These animals necessarily pass through all 4 

 circles, and each class therefore divides into 4 orders, 

 or into 5, if the senses be allowed to hold good as 

 constituting a distinct order in themselves. 



Two points of departure for classification here admit 

 of being thought of, either wholly from below, or first of 

 all from the commencement of the present circle. In 

 order to be convinced of this, we need only make a slight 

 attempt. The animal series is as follows : 



A. SPLAXCITSOZOA. 

 Circle I. Intestinal animals 

 Class 1. Gastric animals . 



2. Intestinal 



3. Absorbent 



Circle II. Vascular animals . 



4. Venous animals 



5. Arteriose 



6. Cardiac . 



Circle III. Respiratory animals _ 



7. Reticular animals 



8. Branchial 



9. Trachea! 



B. SOMATOZOA. 

 Circle IF. Sarcozoa. 



10. Osseous animals 



11. Muscular 



12. Nervose 



Circle V. Aistheseozoa. 



13. Sense-animals . 



Protozoa. 

 Infusoria. 

 Polypi. 

 Acaleph 



Conchozoa. 

 Mussels. 

 Snails. 

 Kracken. 



Ancyliozoa. 

 Worms. 

 Crabs. 

 Flies. 



Fishes. 



Reptiles. 



Birds. 



Thricozoa. 



3531. Now it is here conceivable, either that the 

 families of Fishes, Reptiles, Birds, and Thricozoa, pass 

 parallel to all the preceding classes from the Infusoria 

 upwards, or that they first commence with the class of 

 Fishes. 



In regard to this question the Birds and Thricozoa 



