192 Cincinnati Society of Natural History. 



the normal ones with a diameter of 74- of an inch or less, 

 with a moderate number of horizontal tabulae ; smaller coral- 

 lites intercalated with the normal ones and with more numer- 

 ous and more closely set tabulae ; and a small number of 

 spiniform corallites situated in the thick walls separating the 

 normal corallites. (Cat. Fos. Cin. Gr., 1871 (name onl}'). 

 Nicholson, Quart. Jour. Geol. Soc. Lond., vol. 30, 1874, p. 504, 

 as Chatetes. Genus Montic, 1881, p. 125.) 



I^ocality. — Cincinnati, O. 



Remarks. — Dr. Nicholson considers this, and the one follow- 

 ing, to be the same. Although closely allied, the smaller 

 form, the oblique openings of the calices, and the absence of 

 maculae, serve to distinguish the two. 



17. — M. MEEKi James, 1878. 



Corallum dendroid, free (?), generall)- branching irregu- 

 larly, often but once, and having in these specimens a Y-like 

 form ; the branches from less than two lines to over six lines 

 in diameter, often hollow, compressed, and filled with clay ; 

 surface smooth, with stellate maculae, ver}' slightly or not at 

 all raised above the surface ; calices sub-equal, polygonal, or 

 sub-circular, slightly larger in the maculae ; walls thick, not 

 spinous; corallites in the axial region thin-walled and polyg- 

 onal, with few tabulae ; as they bend outward toward the sur- 

 face the walls become thickened, and the tabulae are more 

 numerous ; in all cases complete and horizontal ; smaller coral- 

 lites intercalated between the large ones, and having more 

 numerous and more closely-set tabulae. (The Paleontologist, 

 No. I, July 2, 1878, p. I, as Chcetetes; Ibid., No. 5, June 10, 1881, 

 p. 35.) {Amplexopora cingulata Ulrich, Jour. Cin. Soc. Nat. 

 Hist., vol. 5, Dec, 1882, p. 254; A. robusta Ulr., Ibid., vol. 6, 

 1883, p. 82.) 



Locality. — Oxford, Clinton and Warren counties, O.; Am- 

 plexopora cini^iilata at McKinney's Station, C. S. R. R., Ky. 



Remarks. — This form is distinguished from Af. {gracilis by 

 its more robust habit, and the presence of maculae of larger 

 cells than the average. Dr. Nicholson, basing his opinion 

 upon the internal structure, which he says is exactly like A/. 

 i^racilis, considers it to be only a variety of that species. The 



