92 Proceedings of the Boyal Physical Society. 



Geneka. 



f Millepora. 



I Heliolites, Heliopora, Polytremacis. 

 Propora, Plasmovora. Thecia. 



MILLEPOKID^. ^ ^,^4^; 



Thecostegites. 



Axopora. 

 ( Acropora, Seriatopora, Pocillopora, Dendro- 

 \ para, Bhabdopora. 



{Favosites, Koninckia, Favositipora,Michelinia. 

 Poemeria, Emmonsia. 

 Syringopora. 

 AtUopora. 

 ( Halysites. 

 I Stylophyllum. 

 Halysitid^e. \ Chonostegites. 

 I Cohimnaria. 

 [ Beaumontia. 

 ( Alveolites. 

 \ Ccenites. 



ACROPORIDiE. 



FAVOSITIDiE. 



Alveolitid^. 



_ ^ T C Fistulipora. 

 Incerte sedis. [ ^i^^.j^f^^^^ 



Alcyonaria. 

 Ghcetetes, Moiiticulipora, Pernio, Stellipora, Zahechia. 



Another very important memoir upon the "Tabulate 

 Corals" was published in 1873, by Dr Gustav Lindstrom 

 (Ofversigt af Kongl. Vetensk. Akad. Forhandl. 1873 ; Trans. 

 in Ann. and Mag. Nat. Hist., ser. 4, vol. xviii., p. 1, 1876). 

 In this paper Dr Lindstrom entirely discards the " Tabulata" 

 of Milne-Edwards and Haime, as a distinct division of corals; 

 Lahechia, E. and H., is placed among the Hydrozoa ; Monti- 

 ctolipora, D'Orb., Fistulipora, M'Coy, and some other forms, 

 are regarded as Polyzoa ; the Favositidm are placed in the 

 Poritidce, among the Perforate cerals; the Heliolitidm are 

 considered as forming a special group of uncertain zoological 

 position ; Columnaria, Goldf., is placed in the Eugose corals, 

 among the Cyathophyllida^ ; Fletcher ia, E. and H., and 

 Michelinia, De Kon., are referred to the Cystiphyllidce ; and 



