Genera of the North American Palaeozoic Bryozoa. 595 



NiOEA is a recent genus and I very much doubt if any Palaeozoic 

 forms are properly placed here. 



Fig. 197. Berenicea 3Iinnesotensis . Two specimens, natural size. 

 Fig. 198. A portion of the surface, x25. 



Diastoporina, Ulrich. 

 (Jour. Cin. Soc. Nat. Hist., Yol. XII, p. 177. 1890.) 

 Type, Diastoporina fldbellata, Ulrich. 



" Zoarium bifoliate, in general resembling Diastopora ; cells 

 subtubular, prostrate, immersed ; apertures constricted, subcir 

 cular, not prominent; interspaces finely punctate and striate 

 longitudinally." 



Probably a synonym of Diastopora. 



Fig. 199. Diastoporina flabellata, natural size and enlarged. 

 Fig. 200. A still further enlargement of the surface. 



