ON FOSSIL POLYZOA. 183. 
has approached his subject, and I shall not fail to accept several of his 
genera for my own labours, but whenever I do accept them there must 
be clear evidence that I am dealing with the deserted homes of polypides 
and not with the remains of Aleyonarians. 
The following is the classification and family arrangement of the 
Paleozoic Bryozoa, with their included genera already referred to :— 
Order Gymnotemara, Allman. 
Suborder Cyctostomara, Busk. 
Family Tusvutiroripaz, Busk. 
Stomatopora, Bronn. Berenicea, Lamx. 
Proboscinna, Audouin. Rapalonaria, Ulrich. 
Family THronoips, Busk. Scenellopora, Ulrich. 
EntaLopHoripa, Reuss. Mitoclema ,, 
FENESTELLIDA, King. 
29 
29 
Fenestella, Lonsdale. Phyllopora, King. 
Polypora, M‘Coy. Archimedia, Lesueur. 
Septopora, Prout. Lyropora, Hall.} 
Fenestralia, ,, 
Family Acanrnocnapipa, Zittel. Penniretopora, D’Orb. 
= Glauconome, Lonsdale. 
Family ARTHRONEMID2, Ulrich. 
Arthronema, Ulrich. Arthroclemia, Billings. 
Suborder Treprosromara, Ulrich. 
Family Prinopicryonip#, Zittel. 
Ptilodictya, Lonsdale Dicranopora, Ulrich. 
Graptodictya, Ulrich. Clathropora,  ,, 
Arthropora, 9 
Family Sticroporip#, Ulrich. 
Stictopora, Hall. Oystodictya, Ulrich. 
Stictoporella, Ulrich. Pachydictya, ,, 
Rhinodictya, ,, Phyllodictya,  ,, 
Pheenopora, Beh, 
Mr. Ulrich says in the last two families diaphragms (tabula) are 
often developed ; and as the remaining three families, Monticuliporide, 
Nicholson, Histuliporide, Ulrich, and Ceramoporide, have diaphragms 
(tabule) strongly developed, they cannot be admitted amongst the 
Polyzoa for reasons already given. The family Ceramoporide contains 
one genus, Hridopora, some of the species of which closely resemble our 
own Carboniferous Oeramopora megastoma, M‘Coy, and Mr. M‘Coy’s 
genus Fistulipora (type F. minor) is in all probability only the mature 
growth of C. megastoma, M‘Coy.? 
' Carinopora, Cryptopora, Nich., Ptilopora, M‘Coy, not examined, Ulrich. 
* Mr. John Young, F.G8., on Fistulipora minor, Ann. Mag. Nat. Hist. Dec. 1882, 
and Review of the Family Diastoporide, Vine, Quart. Jour. Geo. Soc. 1880, p. 356. 
