BRYOZOA. 107 
Classification. | 
Family HETEROTRYPID.®, Ulrich. 
Genera: Heterotrypa NicHoL~son, Dekayia EDWARDS and HAImME, Petigopora U., Dekayella U. 
Family CALLoPporip«&, Ulrich. 
Genera: Callopora HALL, Calloporella U., ? Aspidopora U. 
Family TREMATOPORID®, Ulrich. 
Genera: Trematopora HALL, Nicholsonella U., Constellaria DANA, Stellipora HALL, Idiotrypa U. 
Family BATOoSTOMELLID, Ulrich. 
Genera: Batostomella U., Stenopora LONSDALE, Anisotrypa U., Bythopora MILLER and Dyer, Cal- 
lotrypa HALL, Leioclema U. 
Family AMPLEXOPORID®, Ulrich. 
Genera: Amplexopora U., Monotrypella U., Petalotrypa U., Atactopora U., Leptotrypa U., ? Disco- 
trypa U. 
Family DIPLOTRYPIDA, Ulrich. 
Genera: Diplotrypa NICHOLSON, Monotrypa NICHOLSON, Batostoma U., ? Hemiphragma U. 
Family CERAMOPORID.®, Ulrich. 
Genera: Ceramopora HALL, Ceramoporella U., Crepipora U., Diamesopora HAtL, Chiloporella U., 
Ceramophylla U., Anolotichia U., Spatiopora U. 
Family FistuLirorip 4, Ulrich. 
Genera: Fistulipora McCoy, Eridopora U., Chilotrypa U., Meekopora U., Strotopora U., Lichenotrypa 
U., Buskopora U., Selenopora HAuL, Pinacotrypa U. 
Family BorryLLOPoRID&, Miller. 
Genus: Botryllopora NICHOLSON. . 
Suborder CYCLOSTOMATA, Busk. 
Zocecia very simple, tubular, with a plain, inoperculate, circular orifice ; wall 
thin, minutely porous. Marsupia and appendicular organs wanting. 
Family TusuLiPporip®, Busk. 
, Genera: Stomatopora BRONN, Proboscina AUDOUIN, Berenicea LAMOUROUX, Diastoporina U., 
-? Hedrella HALL, ? Hernodia HALL, ? Reptaria ROLLE. 
Family FRONDIPORID®, Reuss. 
Genus: Scenellopora ULRICH. 
Family ENTALOPHORID®, Reuss. 
Genera: Clonopora HALL, Mitoclema U., Diploclema U., Protocrisina U., ? Cystopora HALL. 
Suborder CTENOSTOMATA, Busk. 
Zocecia usually isolated and developed by budding from the internodes of a distinct 
tubular stolon or stem. Orifice terminal, closed by an operculum of sete. Zoarium 
horny or membranaceous. Marsupia wanting. 
Family ASCODICTYONID®, Ulrich. 
Genera: Ascodictyon NICHOLSON and Erurip@r, Rhopalonaria U., Vinella U. 
