Vol. 68.] BRYOZOA PKOil THE LOWER CARBONIFEROUS. 



575 



Pig. 9. — Tangential section of Stenophragma lobatum : sJiowing the 

 polygonal and rounded outlines of the zooecia (z), mamj of which 

 are furnished luith narroiu diaphragms {di) -^ also great variation 

 in the thichiess of the lualls. X about 20 diameters. 



Fig. 10. — Tangential section of Stenophragma lobatum, showing the 

 distribution of the numerous acanthopores (a), and passing 

 through a portion of a monticule (m). x about 20 diameters. 



