vine: classifications of cyclostomatous polyzoa. 355 
Cerioporidae and Theonoid.se are done away with, as no species 
belonging to these Fossil Groups are known to exist. 
In the introduction-^' to the British Marine Polyzoa, Mr. Hincks 
modifies the arrangement of Mr. Busk, but on account of the 
limited range of the British region, some few alterations in the 
generic divisions had to be made when dealing with the Cyclostomata 
of Foreign regions. For the British Marine Polyzoa, only four 
families were adopted : — 
I. — Crisidae. III. — Horneridse ; and 
1 1 . — Tubuliporidae. IV. — Li chenoporidse. 
In the Catalogue of Marine Polyzoa of Victoria,t Mr. P. H. 
MacGillivray, however, accepts Mr. Busk's family arrangements, 
slightly altered, but he adds several new Genera as follows : — J 
Family 1. — Crisidse. Crisia, Lamx. 
„ II. — Idmoneidae. Idmonea, Lamx. 
Hornera, Lamx. 
„ III. — Tubuliporidae. Tubulipora, Lamx. 
Stomatopora, Bronn. 
Diastopora, Johnston. 
Liripora, MacGillivray. 
Entalophora, Lamx. 
,. IV. — DiscoporeUidse. Lichenopora, Defrance. 
Densipora, MacGillivray. 
Favosipora, MacGillivray. 
FloscuUpora, MacGillivray. 
„ V. — Frondiporidee. Fasciculipora, D'Orbigny. 
It will be noticed in common with other workers, that Mr. 
MacGillivray uses the Generic term Entalophoixi, msteeid of Pasiulopora 
(Busk, Brit. Mus. Cat., pt. III.) The reason which Mr. Hincks gives 
for reinstating the first generic name, is, on the whole, perfectly 
agreeable, but out of common fairness, Mr. Busk's reason for rejecting 
the term will be given further on. " A question arises," says Mr. 
* London: John Van Voorst, 1830, p. cxxxix. 
t Transactions (?) Roy. Soc. Vict., 1886.) 
X New Genera in Italics. 
