Plate 9. 

 Graptodictya proava (Eichwald). 



Fig. 1. Nearly complete zoarium, X1.5. 



2. Fragment, X2, Blowing the striated base pointed for articulation. 



3. View, natural size, of an old, average example. 



4. Surface, X5, of another fragment. 



5. Fragment of a rock, X2, containing a solid, ramose bryozoan, to which is 



attached the cuplike, attached basal expansion of this species. 

 Wassalem beds (D3), Uxnorm, Esthonia. 



6. View, natural size, of the American example of this species described by 



Sardeson as Stictoporella cribrosa. 

 Lower part of Trenton limestone, Kenyon, Mumesota. 

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