400 MANUAL OF HISTOLOGY. 



B. Belonging to the Animal Group. 



6. Bony apparatus or system. 



7. Muscular apparatus or system. 



8. Nervous apparatus or system. 



9. Sensory apparatus. 



Having been obliged, in speaking of the different tissues, to refer fre- 

 quently to their arrangement in the formation of various organs, or their 

 constitution within composite apparatuses, the discussion of this third part, 

 or Topographical Histology, will be very irregular as regards. the several 

 parts. The chief object to be kept in view will be the description of the 

 finer structure of organs, with reference to that, in the microscopical 

 relations of the same which could not before be brought under notice. 



