BRYOZOA. 367 



SYNOPSIS OF CLASSIFICATION. 



Order GYMXOL-EMATA Allinann. 

 Sub-order CTEXOSTOMATA Busk. 



Family ASCODICTYOXUXE Ulrich. 



Zoaria adnate, consisting of radially arranged filiform, fusi- 

 form, or bulbous zooecia; or of sub-fusiform uniserial cells. 

 Substance? corneo-calcareous. 



< >DICTYON Nicholson and Ethridge, jr. Zooecia consisting of 

 radially arranged, fusiform or bulbous zooecia, or filiform threads 

 with periodic swellings. 



Type: A. fusiforwe Xich. and Ethr. jr. Range, Cincinnati 

 group to Coal Measures. 



RHOPALOXARIA Ulrich. Cells slender, fusiform, arranged in a 

 single anastomosing series. Cell mouths small, near one end of 

 the cells. The animal had the power of excavating the sub- 

 stance of the body upon which it grew. 



Type: E. venosa Or. Range, Trenton and Cincinnati. 



Suborder CYCLOSTOMATA Busk. 



Family TUBULIPORID-E Busk. 



STOMATOPOBA Bronn. Zoaria adnate. with the zooecia in a 

 single branching series. Zooecia tubular, the apertures circular, 

 more or less elevated, subterminal. Walls finely porous. 



Type: S. dicbotoma Larnx. Range, Trenton to Recent. 



