6 



PKOF. P. MARTIN Duncan's eevision of the 



the Aporosa, in consequence of Moseley's discoveries of their 

 remarkable mesenteries. Eesearch has shown that many Madre- 

 poraria Aporosa and Perforata have tabulae, with or without 

 ordinary dissepiments, for instance species of LopJiohelia, CyatJio- 

 pJiora, AstrcEopora, Favositipora, Alveopora, and Madrepora. 



With regard to the section Madreporaria Ttugosa, it is necessary 

 to eliminate certain genera of deep-sea corals, and some genera 

 from the Secondary rocks, and to place them in the Aporosa and 

 Perforata. 



After considering the relations of the Madreporaria Aporosa, 

 Madreporaria Perforata, and tlie old family of the Eungidse, I 

 have no hesitation in classifying the Sclerodermic Zoantharia as 

 follows : — 



Section I. MADEEPOEAEIA APOEOSA. 



II. MADEEPOEAEIA FUlSiaiDA. 

 III. MADEEPOEAEIA PEEFOEATA. 

 lY. MADEEPOEAEIA EDGOSA *. 



The Great Divisions of the Sclerodermic Zoantharia or 

 Madreporaria. 



Class ANTHOZOA. Suborder Zoantharia Sclerodermata 

 or Madreporaria. 



Sections : — Madreporaria A]3orosa, Fungida, Perforata. 



Section MADREPORARIA APOROSA. 

 I. Family Turbinolid^ (pars), EJ. & II. 



II. „ OcuLiNiD^ (pars), Ed. & H. 



III. „ POCILLOPORID^. 



IV. „ AsTR^iD^, Ed. & II., amended. 

 Section MADREPORARIA FUNGIDA. 



I. Family Plesiofungid^. 



II. „ Fungida, Dana (pars). 



III. „ LOPHOSERID^. 



IV. „ Anabaciad^. 



V. „ Plesioporitid^. 



Section MADREPORARIA PERFORATA. 

 T. Family Eupsammid^. 

 II. „ Madreporid^, Ed. & H. 



III. „ PORITID^, Ed. & H. 



* This section is not considered, and probably most of its genera are not 

 Madreporarian. 



