Genera of the North American Palaeozoic Bryozoa. 623 



bifurcating ; branches short, simple ; occasionally elongated and 

 becoming bilaterally branched ; stems and branches celluliferous 

 on the side overlooking the imaginary axis of the coral ; cellules 

 imbricated and arranged in longitudinal series ; series of cellules 

 separated from each other by a dividing ridge ; gemmuliferous 

 vesicles (?) on the dividing ridge." 



The following figures are photo engravings from King's orig- 

 inal illustrations : 



L ■ iii ft {P^ 



Fig. 73. Acanthocladia anceps. 1.3, A specimen slightly enlarged ; 14, A specimen x2 ; 15, lAn 

 enlargement to show the cell apertures ; 16, A specimen, nat. size. 



