BRYOZOA—CYCLOSTOMATA. 



119 



11. P. tumulosa Ulrich. (Fig. 178, d.) Ordovicic. 



Narrow bifurcating branches, with a double (rarely triple) row 

 of bulbous zocecial swellings with apertures. 



Black River of Minnesota. 





Fig. 178. a, Stomatopora inflatay^q; b, S, de/icatu/a y( 12 *4 > c, Proboscina 

 frondosa X 9 > ^> P- tumulosa X /^> an d X A-%. \ e i Berenicea minnesotensis X Yz 

 and X 9 \ f> Diasioporina fiabellata X Yz an d X 3)4 > w ^ tn an nelid tube attached ; g, 

 h, Mitoclema mundulum X K an< ^ X 4-K > *> Phacelopora pertenuis, X I2 /^ > /» 

 Ceramoporella inclusa X 9» an< i X 2 ° 5 &, Crepipora simulans, tangential section show- 

 ing a macula and lunaria X 9 > A Coeloclema trentonense X ^ and X 4/^» (All after 

 Ulrich.) 



VII. Berenicea Lamouroux. 

 Thin, discoid, flabellate or irregular incrustations with tubular 

 zocecia arranged in irregular, attenuating lines. Ord.-Silur. ; Jur.- 

 Recent. 



12. B. minnesotensis Ulrich. (Fig. 178, e.) Ordovicic. 



Zocecia similar to P. tumulosa, arranged in irregular rows on a 

 flabellate surface. 



Stones River and Black River of Minnesota. 



VIII. Diastoporina Ulrich. 

 Bifoliate zoaria with tubular zocecia prostrate and partly sunken 

 into the connecting mass. Ordovicic. 



