On the Monticidiporoid Corals of the Cincitinati Group. 37 



the genus will be removed eventually from the Monticuloporoid 

 alliance and placed in some other one of the Ccelenlerata, but we 

 think without doubt its final position will be there rather than with 

 any class of the Polyzoa. Septa of a similar kind to those in M. 

 o/u'oensis, are found in M. [Fistitlipora) alternafa, described above. 



1. C. OHiOENSis, Nicholson. 

 Palaeont. of Ohio, II, 265, 1875. 



Corallum " incrusting, forming thin expansions attached to 

 the surface of brachiopods or corals, and consisting typically at 

 any rate, of a single layer of oblique cells. Cells arranged in 

 intersecting diagonal lines, and disposed in a somewhat concentric 

 manner round more or fewer central points: their upper walls thin 

 and arched ; the cell-mouths oblique, and, when perfect, semi- 

 circular in shape. About eight cells in the space of one line " 

 ( Nicholson.) 



Obs. This species is a well marked one, and when found in 

 a perfect condition can be very readily recognized. In many cases, 

 however, the surface of the fossil is more or less abraded and 

 worn, and then it presents an entirely different aspect. Dr. Nich- 

 olson in speaking, of worn examples says that when only slightly 

 worn the cell cavity appears to be divided into two compartments, 

 each of a triangular shape, by means of an internal septum, while 

 smaller cavities appear in the walls between the cells. When still 

 more abraded, the cells have rounded or oval apertures, are arrang- 

 ed in diagonal rows, and "separated by a vast number of small 

 rounded foramina, which appear to be the mouths of interstitial 

 tubuli.'' When in this condition the species might be readily mis- 

 taken for a Alonticulipora, especially the sub-genus Fistulipora. 



Formation and Locality. Lower Siturian, Cin'ti Gr., Cincin- 

 nati, O. 



2. C. BEANi, U. p. James. 



The Palaeontologist, p. 5 1878. (with a query (?)). Jour. Cin. 

 Soc. Nat. Hist., VII, 23, 1884 (also with a query (?) as to the 

 genus, and misspelled Cerampora ). 



(?) Paleschara beani, James. Ulrich. Am. Geologist, I, 

 186, 1888. 



Corallum incrusting, forming thin, irregular expansions on 

 shells of Orthoccras, and perhaps other bodies. Cells arranged in 

 somewhat quincuncial order, in alternating, oblique rows, or at 

 times irregular. Cell walls rather thick, with minute pores some- 

 times visible at the angles. Apertures oval, diamond-shaped or 



