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TABLE XLII. 



Sjitematic Survey of those Primitive Organs which most probably be 

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

 Animals, and Vertebrates.*** 



Wdms 

 (Fermet). 



Articulated 



Animals 

 {Arthropoda). 



Soft-bodied 

 Animals 

 {Molluscdy 



Vertebrates 

 {rerUbrmtm). 



IL Products of the Differentiation of the Skin-fibrous Layer. 



1, Leather-skin 

 {Corium) 



(together with the 

 circular muscle- 

 pouch ?) 



S. Longitudinal 

 muscle-pouch 



i. Exocoelar innermost 

 cell- layer of the 

 body-wall (also 

 Bale germ-plate?) 



4. Leather-skin 

 (Rudiment) 



6. Trunk-musclea 



6. Exocoelar innermost 

 cell-layer of the 

 body- wall (also 

 male germ-plate?) I 



4. Leather-skin 



(Corium) 



(together with the 



muscles of the 



skin ?) 

 6. Inner trunk-muscles 



6. Exocoelar parietal 

 epithelium of the 

 coelom (also male 

 germ-plate?) 



4. Leather-skln 



(Cbrium) 

 (together with the 

 muscular layer of 

 the skin ?) 

 6. Side tmnk-muscles 



6. Exoccelar parietal 

 epithelium of the 

 coelom (also male 

 germ-plate ?) 



m. Products of the Differentiation of the Intestinal-fibrous Laymr. 



IV. Products of the Differentiation of the Intestinal-glam^dular Layer. 



12. Intestinal epithe 

 lioffi 



12. Intestinal epithe- 

 liom 



12. Intestinal epithe- 

 lium 



12. Intestinal 

 Uun 



