16 AMERICAN FOSSIL BRYOZOA. [bull. 173. 



Family Batostoniellidai Ulrich. 



Batostomella Ulrich, Bythopora Miller and Dyer, Callotrypa Hall, 

 Trematella Hall, Eridotrypa Ulrich, Stenopora Lon.sdale, Anisotrypa 

 Ulrich, Lioclema Ulrich, Lioclemella Foer.ste, ? Thallostigma Hall. 



Family Constellariidtv Ulrich. 



Constellaria Dana, Stellipora Hall, Nicholsonella Ulrich, Idiotrypa 

 Ulrich, 'i Dittopora Dybowski. 



Family Trematoporidaj Ulrich. 



Trematopora Hall, Batostoma Ulrich, Hemiphragma Ulrich, Stroma- 

 totrypa Ulrich, Monotrypa Nicholson, Diplotrypa Nicholson (emend. 

 Ulrich). 



Famil}^ Calloporidje Ulrich. 



Callopora Hall (emend. Ulrich), ? Calloporella Ulrich. 



Suborder Cryptostomata Vine. 



Family Phylloporinida? Ulrich. 



Phylloporina Ulrich, Drymotrypa Ulrich. 



Family Fenestellida^ King. 



Fenestella Lonsdale, Semicoscinium Prout, Fenestrapora Hall, Iso- 



trypa Hall, Loculipora Hall, Unitrypa Hall, Hemitrypa Phillips, 



Helicopora Claypole, Archimedes Owen, Polypora McCoy, Lyro- 



pora Hall, Fenestralia Prout, Thamniscus King, Phyllopora King, 



Reteporidra, Reteporina D'Orbigny, Ptiloporella Hall, Ptiloporina 



Hall. 



Family AcarthocladiidaB Zittel. 



Pinnatopora Vine, Acanthocladia King, Septopora Prout, Synocladia 



King, Ptilopora McCoy, Ichthyorachis McCoy, Diploporaria, ? Ram- 



ipora Toula. 



Family Sphragioporidaj Ulrich. 



Sphragiopora Ulrich. 



Family Arthrostylid* Ulrich. 



Arthrostylus Ulrich, Helopora Hall, Arthroclema Billings, Sceptro- 

 pora Ulrich, Nematopora Ulrich. 



Family Rhabdomesontida? Vine. 



Rhombopora Meek, Rhabdomeson Young and Young, Coeloconus 

 Ulrich, Bactropora Hall, Orthopora Hall, Acanthoclema Hall, Nema- 

 taxis Hall, ? Tropidopora Hall, ? Streblotrypa Ulrich, ? Hyphasmo- 

 pora Etheridge, Jun. 



Family Chainodictyonidse. 

 Chainodictyon Foerste. 



