154 Cincinnaii Society of Nalural History. 



R( marks. — ^This species frequentl}- forms masses of consid- 

 erable size, and when weathered shows long parallel tubes, 

 like organ pipes on a small scale. 



2.— T. MINUS, vSafford, 1856. 



Corallum massive, hemispherical or amorphous, composed of 

 slender, closely approximated corallites diverging from an 

 imaginary axis ; corallites sometimes 3 inches long, about )'}, 

 to j^ of a line wide, the walls tolerably thick and four or five- 

 sided ; septa 4, imperfectly preserved and often detected with 

 difficulty ; tabula.' well developed, complete and remote, 5 or 

 6 to a line. (Ibid., p. 238; Nicholson, Pal. of Ohio, vol. 2, 

 1875, p. 222.) 



Locality. — Cincinnati, Lebanon, Wayne.sville, etc, Ohio. 



Remarks. — The description given of this species by Safford 

 is very meager, consisting of the statement that the specimens 

 are generally small, the tubes ^4 to ' .^ of a line broad, regular 

 or irregular, generally four-sided, and with the lamelkie as in 

 T. fibratiim. We have, therefore, given the above descrij^tion 

 as printed in the Palaeontology of Ohio. 



3. — T. coLrMN.VRK, Hall, 1847. 



Corallum massive, a foot or more in diameter, hemispherical 

 or sub-globose, consisting of a series of parallel or diverging 

 polygonal tubes; tubes four or five-sided, simple, without 

 visible transverse dissepiments or connecting pores; interior 

 of cells apparently rugose or denticulate. (C/urtetes co/iinniaris. 

 Hall, Pal. of N. Y., 1847. vol. i, p. 68.) 



Locality. — Upper part of Cincinnati Group. 



Remarks. — This species, originally described as a species 

 of Cha-tctes, is recorded by Ulrich (Cat. Foss. Cin. Or., 1880,) 

 as occurring in the upper part of the Group. While it differs 

 from the two other species in its general appearance and mode 

 of growth, it seems to belong to the present genus, where it 

 was, in fact, placed by vSafiford as long ago as 1856. (1. c, p. 

 237.) It has the characteristic sc^uare tubes, and, while the 

 cruciform character is not well marked, there are indications 

 of indentations of the walls in well-preserved specimens. 



