CORALS OF THE CORNIFEROUS LIMESTONE. 239 



usually produced in a whorled manner from the annulations of the coral- 

 lites. 



Position and locality : Oorniferous limestone, Columbus, Ohio ; also from the same 

 formation at Louisville, Kentucky. Mr. Billings describes the species from the Cor- 

 niferous limestone of western Canada. 



Eridophtllum Verne uilakum, Edwards and Haime. 



Eridophyllum Verneuikmum, Edwards and Haime ; Pol. Foss. des Terr. Pal., p. 424, pi. 8, 



flgs. 6, 6a. 

 Eridophyllum, Vemeuilanum, Billings ; Canadian Journal (new series). Vol. IV., p. 131, 



fig. 26. 

 Eridophyllum Vemeuilanum, Nicholson ; Rept. on the Palsedntology of Ontario, p. 35, 



fig. 7. 



Corallum composed of cylindrical, kraight, or slightly flexuous coral- 

 lites, which have a diameter of from four to six lines, and are united by 

 horizontal connecting processes placed at intervals apart of from half an 

 inch to an inch and a half. Septa usually about forty-five in number, 

 alternately large and small, extending very nearly to the center of the 

 visceral chamber, and thus invading the central tabulate area. The 

 septa are united in the outer zone of the corallites by numerous delicate 

 dissepiments. The distance between the different corallites varies much, 

 being sometimes as much as half an inch, whilst at other times the 

 corallites are nearly in contact. 



E. Vemeuilanum closely resembles E. strictum, but the corallites are 

 larger, and are usually more remote from one another, whilst the con- 

 necting processes are not only larger, but are also more remote. In the 

 best preserved specimen from Ohio that I have seen the corallites are 

 strongly annulated with periodic growth-swellings, and are close together ; 

 thus differing from the typical form of the species, and being distin- 

 guished from E. strictum by little but the greater size of the corallites and 

 the greater remoteness of the connecting processess. The number of 

 the septa, as pointed out by Mr. Billings, is much larger than that 

 given by Edwards and Haime, viz., twenty-two. On the contrary, there 

 appear to be from forty to sixty septa, alternately large and small, the 

 former nearly or quite reaching the center. The outer area of the coral- 

 lites is rendered vesicular by the presence of numerous dissepiments, and 

 there is a well-marked central tabulate area. The epitheca is marked 

 with longitudinal striae corresponding with the septa, and there are also 

 fine encircling striae. 



Position and locality : Oorniferous limestone, Columbus, Ohio. 



