CLASSIFICA TION. 



Name of Genus. 

 Thecosiegites, 

 Chonostegites, 

 Fletcheria, 

 Pocillopora, 

 Can ties, 

 Seriatopora, 

 Thecia, 

 Colurniiaria, 



To be removed to 

 Heliolitidce. 

 Alichclinia. 

 CystipJiyllidce. 

 OciilinidcB (Verrill). 

 Polyzoa ? 

 Oculijiidm ? 

 HclioUtidce ? 

 CyatlwphyllidcE. 



In a paper published by M. G. Dollfus in 1875 (Comptes 

 Rend., t. Ixxx.), the HeliolitidcB are regarded as unquestion- 

 ably the representatives of the recent Milleporidce — a view 

 which Mr Moseley's researches have rendered altogether un- 

 tenable ; and the P ocilloporidiB are regarded, along with the 

 preceding, as Hydrozoa — an opinion which the researches 

 of Professor Verrill have sufficiently disproved. Syringopora, 

 Haly sites, Aulopora, and allied forms, are regarded as being 

 either Polyzoa allied to Hippothoa and Idmonea, or else Alcy- 

 onaria. The family of the Chietetidce is considered as hav- 

 ing a direct relationship with the Jurassic Polyzoa of the 

 genus Heteropora and the Cretaceous Radiopora. The Favo- 

 sitidiB are regarded as most probably truly referable to the 

 Polyzoa, the " mural pores " being compared with the inter- 

 cellular pores of certain EscharcB and LepralicE, and of some of 

 the Cyclostomatous Polyzoa {Fungella and Heterop07'ella). It 

 is clear, however, that the author's conception of the real struc- 

 ture of the Favositidcs has been grounded upon very imperfect 

 materials. Lastly, Dendropora and Trachypora — which we 

 now know to be true members of the Favositidce — are placed 

 among the Polyzoa, and are regarded as allied to Horncra. 



In 1876 MrJVIoseley published his exceedingly important 

 papers on the anatomy of the recent Millepora and Heliopoj^a 

 (Notes on Two Species of Millepora, &c., Phil. Trans., 1876; 

 Structure of a Species of Millepora occurring at Tahiti, Ann. 

 and Mag. Nat. Hist, 1876; Structure and Relations of the 

 Alcyonarian Heliopora ceerulea, Phil. Trans., 1876), which at 

 once threw a flood of light upon the subject of the structure 

 and affinities of the Palaeozoic "Tabulaia:' I shall have again 



