98 Cincinnati Society of Natural History. 



sepiments) about 12, more or less, meeting in the center. 

 The rays generally reach one-half or two-thirds of the distance 

 from the margin to the center." The following species have 

 been found in the rocks about Cincinnati. 



I. — C. ALVKOL.\TA, Goldfuss, 1 826. 



Corallum massive, subhemispheric or pyriform, often attain- 

 ing a very considerable size ; corallites prismatic, hexagonal 

 or pentagonal, but often more or less drawn out along one 

 axis, the larger ones being from rather less than two to over 

 three lines in their long diameter, and having numerous much 

 smaller tubes interspersed among them ; walls of the corallites 

 more or less amalgamated, the line between contiguous tubes 

 still remaining quite distinct ; mural pores apparently want- 

 ing ; septa unequally developed, alternately large and small, 

 the latter quite rudimentary, and the former extending usually 

 across two-thirds of the distance between the wall and the 

 axis of the visceral chamber, or even reaching the last men- 

 tioned point ; septa thin and flexuous, but completely lamellar, 

 the number of each series varying from 12 to 15 or more; 

 tabulce complete, horizontal or somewhat flexuous, about six 

 in the space of two lines; calices polygonal, unequally sized, 

 moderately deep, with thin margins, usually closely con- 

 tiguous, but sometimes separated by slight interspaces; the 

 floor formed by the uppermost tabula, the surface of which is 

 striated by the radiating septa. (Nicholson, Pal. Tabulate 

 Corals, 1.S79, p. 195; Goldfuss, Pet. Germ., vol. i, 1826, p. 72; 

 Ibid., 2d ed., vol. i, 1862, p. 68.) Favistella stellata, Hall. 

 Pal. of N. Y., vol. I, 1847, p. 275. 



Locality. — Cincinnati and various places in the vicinity; 

 New York, Canada, etc. 



Remarks. — The above is the description given by Nicholson, 

 and is much fuller than the original. There is no doubt about 

 Hall's Favistella stellala being a synonym. 



2. — C. CAMCIN.A, Nicholson, 1S-4. 



"Corallum subhemispheric or jiyriform, of moderalf but 

 not very large dimensions. Corallites partially in contact, 



