Proceedings of the Royal Physical Society. 



GENUS. 



Striatopora, Hall, 

 Trachypora, E. and H. (with 



Deiidroioora, Mich., and 



BhaMopora, M'Coy), 

 Cmiites, Eichwald, 

 Columnopora, Mch., 

 Koninckia, E. and H., 

 Favositipora, Sav. Kent 



(? Poritidce), 

 Arwopora, Nich. and Eth 



jun. (? Poritidce), 

 Rcemeria, E. and H. (? Syrin 



goporidm), 

 Syringolites, Hinde, 

 Nyctopora, Mch., . 

 Eomingeria, Mch., (=Quen 



stedtia, Eominger), 

 Stenopora, Lonsd., 

 Billingsiay De Kon., 



.? Laceripora, Eichw. 



Nodidipora, Lindstr., 



GEOLOGICAL RANGE. 

 Upper Silurian and Devonian 



I Devonian and Carboniferous. 



Silurian and Devonian. 



Silurian. 



Cretaceous. 



> Kecent. 



> Devonian. 



> Devonian. 



Upper Silurian. 

 Lower Silurian. 



!- Devonian. 



Carboniferous. 



Devonian, 

 f Upper Silurian and Carboni- 

 ( ferous. 



Upper Silurian. 



IV. CoLUMNARiAD^. — Under this head I provisionally 

 place a few Palaeozoic corals, of which CohimnaHa aheolata, 

 Goldf. (= Favistella stellata, Hall), is the type-form. In 

 this type the corallum is massive, composed of polygonal, 

 usually more or less closely contiguous, corallites, with well- 

 developed imperforate walls, destitute of " mural pores," and 

 with complete lamellar septa, some of which usually extend 

 to the centre of the visceral chambers of the tubes. There is 

 no columella and no coenenchyma, and the tabulae are re- 

 markably well developed. We may provisionally place in 

 this group the singular genus Lyopora, Nich. and Eth., jun., 

 in which the septa are rudimentary, and the walls are re- 

 markably thickened. Both genera are Lower Silurian. 



As to the precise position of the typical Goliimnarice in 

 the zoological series, it does not seem possible to speak with 

 any certainty. The typical forms of the group exhibit 

 certain curious Eugose features in the disposition of the 

 septa, and may really form an aberrant group of the Rugosa. 



