TABLE SHOWING THE CLASSIFICATION OF THE MOLLUSCOIDA 

 DESCRIBED IN THIS CHAPTER 



Class 

 POLYZOA 



Subclass 

 Ectoprocta 



(Excretory opening outside lophophore; mouth in center of circle 

 of tentacles; tentacles retractile) 



Order 

 GYMNOUEMATA 



( Circular lophophore) 



Suborder 



CYCLOSTOMATA 



(Tubular calcareous 

 zoaecia, with circu- 

 lar apertures devoid 

 of closing appara- 

 tus) 



Genera 



ARTICULATA / 



(Erect branches divided! 

 at intervals by chitinous [ 

 joints) 



INARTICULATA 



Tubulipora 



(Erect or adherent zoa- | Diastoportl 

 * riuin; unjointed) 



Species 



C. eburnea 



T. flabeUaris 

 l>. patina 



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