( 387 ) 

 TABLE XLII. 



Systematic Survey of those Primitive Organs which must probably be 

 regarded as homologous in Worms, Articulated Animals, Soft-bodied 

 Animals, and Vertebrates.'"^ 



Worms 



( Vermes'). 



Articulated 



Animals 

 (^Artkropoda), 



Soft-bodied 

 Animals 



(^Mollusca), 



Vertebrates 

 (^Vcrtebrata). 



III. Products of the Differentiation of the Intestinal-fihrous Layer. 



IV. Products of the Differentiation of the Intestinal-glandular Layer. 



12. Intestinal epithe 

 Hum 



12. Intestinal epithe- 

 lium 



12. Intestinal epithe- 

 lium 



12. Intestinal epithe- 

 lium 



