I'alcouloloi^y of the Cindiiiia/i (.roiift. 99 



and jiartially more or less completely separate from one 

 another, averaging al)out two lines in diameter, but varying 

 from less than a line up to three lines. When the corallites 

 are more or less uniformly contiguous (as always toward the 

 base of the colony), they are prismatic and polygonal. In 

 diverging from the base, however, the tubes separate from one 

 another to a greater or less extent, so as to leave more or less 

 conspicuous intervals between them. In these portions of 

 their course each corallite is surrounded by a distinct and 

 separate wall, which is marked exteriorly by strong vertical 

 ridges, and intervening grooves, about five of which occur in 

 the space of one line, together with five encircling striae. 

 Septa alternately large and small, 28 in number altogether, 

 the primary ones being continued over the upper surfaces of 

 the tabulae to near the center of the corallites, whilst the 

 secondary ones are marginal and rudimentary. Tabulae well 

 developed and complete, about three in the space of one line. 

 Increase by calicular gemmation, combined with parietal 

 budding." (Nicholson, Pal. Tabulate Corals, 1879, p. 197.) 

 Favistella calicina, Nich., Rept. Brit. Asso. Adv. Sci., 1874; 2d 

 Rept. Pal. of Ontario, 1875, p. 24. Columiiaria hcrtzeri, 

 Rominger, Foss. Cor. Michigan, 1876, p. 90. 



Locality. — Cincinnati and vicinity, Kentucky, Ontario. 



Remarks. — As will be observed, Nicholson first referred this 

 species to Favistella, but later changed it to the genus here 

 given. Rominger's description is as follows : 



C. hertzeri: " Colonies of tubes, partially in close con- 

 tiguity, of polygonal form, and intimately united with their 

 walls ; partially free, circular, laterally joining into chain-like 

 rows, not unlike Halysites, or opening singly on the surface. 

 Diameter of tubes three mm. Structure otherwise entirely 

 corresponding with the associated form. Columnar ia stcllata. 

 Is described by Nicholson under the name Favistella calycina.'" 

 (Palaeontology. Fossil Corals [of Lower Peninsula of Michi- 

 gan] Geol. Sur. Mich., vol. 3, pt. 2, 1876, p. 91.) 



3. — C. (?) HALLI, Nicholson, 1879. 



" Corallum forming large massive colonies, which vary 

 from a few inches to several feet in diameter, and which are 



